VP Lab 1-16 Programs

8/3/2019 VP Lab 1-16 Programs

1/62

EX No: 1 STUDY OF VC++COMPONENTS

AIM

To study the components of visual C++.

COMPONENTS:

Project

A project is a collection of interrelated source files that are compiled and

linked to make up an executable windows based program or a DLL. Source files

for each project are generally stored in a separate subdirectory. A project depends

on many files outside the project subdirectory too, such as include files and library

files.

The Resource Editors

The main window hosts a resource editor appropriate for the resource type.The window can also host a wysiwyg editor for menus and a powerful graphical

editor for dialog boxes. Resources include project-specific items, such as bitmap

(BMP) and icon (ICO) files, and resources common to all visual C++ programs,

such as error message strings. Editing the RC file outside the resource editors is not

recommended.

The C/C++ Compiler

The Visual C++ compiler can process both C source code and C++ source

code. The compiler is complaint with all ANSI standards, including the latestrecommendations of a working group on C++ libraries. Templates, exceptions and

runtime type identification are fully supported in Visual C++ version 6.0,

The Source Code Editor

Visual C++ 6.0 includes a sophisticated source code editor that supports

many features such as dynamic syntax coloring, auto-tabbing, keyboard binding

for a variety of popular editors and pretty printing. In Visual C++ 6.0, an exiting

new feature named AutoComplete has been added. I.e the editor will provide with

list of possible completions to choose from.

The Resource Compiler


2/62

The Visual C++ resource compiler reads an ASCII resource script (RC) file

the resource editors and writes a binary RES file for the linker.

The Linker

The linker reads the OBJ and RES files produced by the C/C++ compiler

and the resource compiler and it accesses LIB files for MFC code, runtime library

code and windows code. It then writes the projects EXE file.

The Debugger

The debugger works closely with Visual C++ to ensure that breakpoints are

saved on disk. If you position the cursor on a simple variable the debugger shows

you its value in a little window. To debug a program, you must build the program

with the compiler and linker options set to generate debugging information.

AppWizardAppWizard is a code generator that creates a working skeleton of a windows

application with features, class names, and resource code filenames that you

specify through dialog boxes. AppWizard code is minimalist code; the

functionality is inside the application framework base classes. AppWizard gets you

started quickly with a new application.

ClassWizard

ClassWizard is a program that is accessible from Visual C++ view menu.

ClassWizard takes the drudgery out of maintaining Visual C++ class code.

ClassWizard writes the prototypes, the function bodies and the code to link the

windows message to the function.

RESULT

Thus the Visual C++ components were studied.

Ex. No: 2 SIMPLE WINDOW CREATION


3/62

OBJECTIVE:

To create a simple window using Win32 Application.

PROCEDURE:

Step 1: Choose FileNew Project tab.

Step 2: Select Win32 Application and enter Project name.

Step 3: Click OK and then choose an empty project from the dialog

box appears.

Step 4: Click finish button.

Step 5: Choose FileNew File tab.

Step 6: Select C++ source file and enter Source file name.

Step 7: Click OK

Step 8: Type the required coding and Save it.

Step 9: Build and Run the Application.

CODING:

#include

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE

hPrevInstance,LPSTR

lpCmdLine,int nShowCmd)

{WNDCLASS wc;

HWND hwnd;

MSG Msg;

static TCHAR szAppName[]=TEXT("Simple Window Creation");

wc.style=CS_HREDRAW | CS_VREDRAW;


4/62

wc.lpfnWndProc=WndProc;

wc.cbClsExtra=0;

wc.cbWndExtra=0;

wc.hInstance=hInstance;

wc.hIcon=LoadIcon(NULL,IDI_ASTERISK);

wc.hCursor=LoadCursor(NULL,IDC_WAIT);

wc.hbrBackground=(HBRUSH)GetStockObject(GRAY_BRUSH);

wc.lpszMenuName=NULL;

wc.lpszClassName=szAppName;

RegisterClass(&wc);

hwnd = CreateWindow (szAppName,"First window Program,

WS_OVERLAPPEDWINDOW,

CW_USEDEFAULT,

CW_USEDEFAULT,

CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,

hInstance,NULL);

ShowWindow(hwnd,nShowCmd);

UpdateWindow(hwnd);

while(GetMessage(&Msg,NULL,0,0))

{

TranslateMessage(&Msg);

DispatchMessage(&Msg);

}

return Msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM

wParam, LPARAM lParam)

{

switch(Message)

{

case WM_DESTROY:

PostQuitMessage(0);return 0;

}

return DefWindowProc(hwnd,Message,wParam,lParam);

}


5/62

SAMPLE OUTPUT:

Viva Questions :

1. What are the parts of windows programming ?

2. List out the member of WNDCLASS structure ?

3. What are the parameters of CreateWindow function ?

4. What is the role of WM_DESTROY ?

5. Name any four APPWIZARD ?


6/62

Ex No: 3 A SIMPLE WINDOW WITH DISPLAY MESSAGE

OBJECTIVE:

To create a simple window using Win32 Application.

PROCEDURE:



Step 3: Click OK and then choose an empty project from the dialog box

appears.




Step 7: Click OK



CODING:

#include


int WINAPI WinMain(HINSTANCE hi,HINSTANCE hp,LPSTR lp,int n)

{

WNDCLASS wc;

MSG msg;

HWND hw;static TCHAR szApp[]=TEXT("Simple Application");

wc.style=CS_HREDRAW |CS_VREDRAW;

wc.lpfnWndProc =WndProc;

wc.cbClsExtra =0;

wc.cbWndExtra =0;

wc.hInstance =hi;


7/62

wc.hCursor =LoadCursor(NULL,IDC_ARROW);

wc.hIcon =LoadIcon(NULL,IDI_APPLICATION);

wc.hbrBackground=(HBRUSH) GetStockObject(WHITE_BRUSH);


wc.lpszClassName="szApp";

RegisterClass(&wc);

hw=CreateWindow("szApp","CAPTION",WS_OVERLAPPEDWINDOW,CW_U

SEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,N

ULL,NULL,hi,NULL);

ShowWindow(hw,n);

UpdateWindow(hw);

while(GetMessage(&msg,NULL,0,0))

{

TranslateMessage(&msg);DispatchMessage(&msg);

}

return msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hw, UINT msg, WPARAM w, LPARAM

l)

{

switch(msg)

{

case WM_KEYDOWN:

MessageBox(NULL,"Hello","Hai",1);

break;

case WM_KEYUP:


break;

case WM_LBUTTONDOWN:


break;

case WM_RBUTTONDOWN:MessageBox(NULL,"Hello","Hai",1);

break;

case WM_DESTROY:

PostQuitMessage(0);

break;

}


8/62

return DefWindowProc(hw,msg,w,l);

}

SAMPLE OUTPUT:

Viva Questions:

1. What is message Loop?

2. What is window ?

3. Expand hIcon , hInstance ?

4. List out the functions of displaying a window ?

5. What are the parameters of WinMain() ?


9/62

Ex. No: 4 A SIMPLE TEXTOUT

OBJECTIVE:

To write a VC++ program to display student details using TextOut

function.

PROCEDURE:



Step 3: Click OK and then choose an empty project from the new dialog

box.




Step 7: Click OK

Step 8: Type the coding and Save it.


CODING:

#include


int WINAPI WinMain(HINSTANCE hi,HINSTANCE hp,LPSTR lp,int n)

{

WNDCLASS wc;

MSG msg;HWND hw;

static TCHAR szApp[]=TEXT("Simple Application");



wc.cbClsExtra =0;

wc.cbWndExtra =0;


10/62

wc.hInstance =hi;



wc.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);


wc.lpszClassName="szApp";

RegisterClass(&wc);

hw=CreateWindow("szApp","CAPTION",WS_OVERLAPPEDWINDOW,CW_U

SEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,N

ULL,NULL,hi,NULL);

ShowWindow(hw,n);

UpdateWindow(hw);


{TranslateMessage(&msg);

DispatchMessage(&msg);

}

return msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hw, UINT message, WPARAM wp,

LPARAM lp)

{

static int cxchar,cychar;

HDC hdc;

int i;

PAINTSTRUCT ps;

TEXTMETRIC tm;

static TCHAR szBuf[5]

[20]={"REGNUMBER","60904205031","60904205019","60904205024"};

static TCHAR szName[5][20]={"NAME","savitha","ramya","priya"};

static TCHAR dob[5][20]={"DOB","24-12-1986","21-5-1986","30-11-

1986"};

switch(message){

case WM_CREATE:

hdc=GetDC(hw);

GetTextMetrics(hdc,&tm);

cxchar=tm.tmAveCharWidth;

cychar=tm.tmHeight+tm.tmExternalLeading;


11/62

ReleaseDC(hw,hdc);

case WM_PAINT:

hdc=BeginPaint(hw,&ps);

for(i=0;i


12/62

SAMPLE OUTPUT:

Viva Questions :

1. State the function name for Loading the cursor and icon ?

2. Mention some window messages ?

3. State any two header files of Window ?

4. Give the syntax of Message Box ?

5. Define Handle ?

Ex. No: 5 SINE WAVE USING LINES AND POLYLINE


13/62

OBJECTIVE:

To write a VC++ program to display sine wave using lines and

polyline function.

PROCEDURE:




box.




Step 7: Click OK

Step 8: Type the coding and Save it.


CODING:

#include

#include

#define NUM 1000

#define TWOPI (2*3.14159)


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTRszCmdLine, int iCmdShow)

{

WNDCLASS wc;

MSG msg;

HWND hwnd;

static TCHAR szApp[]=TEXT("Sine Wave");


14/62



wc.cbClsExtra =0;

wc.cbWndExtra =0;

wc.hInstance =hInstance;





wc.lpszClassName=szApp;

if(!RegisterClass(&wc))

{

MessageBox(NULL,TEXT("Program requires windows

NT!,szApp,MB_ICONERROR);

return 0;}

hwnd=CreateWindow(szApp, TEXT("SINE WAVE USING POLYLINE"),

WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,

CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);

ShowWindow(hwnd,iCmdShow);

UpdateWindow(hwnd);


{

TranslateMessage(&msg);


}

return msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM


{

static int cxclient,cyclient;

HDC hdc;

int i;PAINTSTRUCT ps;

POINT apt[NUM];

switch(message)

{

case WM_SIZE:

cxclient=LOWORD(lParam);


15/62

cyclient=HIWORD(lParam);

return 0;

case WM_PAINT:

hdc=BeginPaint(hwnd,&ps);

MoveToEx(hdc,0,cyclient/2,NULL);

LineTo(hdc,cxclient,cyclient/2);

for(i=0;i


16/62

SAMPLE OUTPUT:

Viva Questions :

1. Give the structure of message ?

2. Name the methods to get the device context.

3. What is the use of device handle ?

4. State the use of LineTo () and MoveToEx() ?

5. State the parameter of WndProc()

Ex. No: 6 GDI FUNCTION - LINE DEMO


17/62

OBJECTIVE:

To draw the Grid lines in the client area using basic line drawing

function.

PROCEDURE:




box.




Step 7: Click OK.



CODING:

#include


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,

LPSTR lpCmdLine, int nShowCmd)

{

WNDCLASS wc;HWND hwnd;

MSG Msg;

static TCHAR szAppName[]=TEXT("SIMPLE WINDOW CREATION");



wc.cbClsExtra=0;


18/62

wc.cbWndExtra=0;


wc.hIcon=LoadIcon(NULL,IDI_ASTERISK);

wc.hCursor=LoadCursor(NULL,IDC_WAIT);

wc.hbrBackground=(HBRUSH)GetStockObject(GRAY_BRUSH);



RegisterClass(&wc);

hwnd = CreateWindow (szAppName,"Grid Lines",

WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,

CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);


UpdateWindow(hwnd);

while(GetMessage(&Msg,NULL,0,0))

{TranslateMessage(&Msg);

DispatchMessage(&Msg);

}

return Msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM


{

PAINTSTRUCT ps ;

HDC hdc;

RECT rect ; int x,y ;

HPEN hpen;

switch(message)

{

case WM_PAINT:

hdc=BeginPaint(hwnd,&ps);

GetClientRect(hwnd,&rect);

hpen=CreatePen(PS_DASHDOTDOT,1,RGB(255,0,255));SelectObject(hdc,hpen);

for(x=0;x


19/62

for(y=0;y


20/62

Viva Questions :

1. List the different styles of pen ?2. Mention the types of brush ?

3. What are the members of RECT structure ?

4. State the function to create a Pen ?

5. What is the role of DefWndProc() ?

Ex. No: 7 SIMPLE KEYBOARD EVENTS

OBJECTIVE:

To write a VC++ program to demonstrate simple keyboard events.

PROCEDURE:



21/62



box.




Step 7: Click OK

Step 8: Type your coding and Save it.

Step 9: Build and Run the Application

CODINGS:

#include

#include

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,

LPSTR lpCmdLine, int nShowCmd)

{

WNDCLASS wc;

HWND hwnd;

static TCHAR szAppName[] =TEXT("Simple Window");

MSG msg;



wc.cbClsExtra=0;wc.cbWndExtra=0;


wc.hIcon=LoadIcon(NULL,IDI_APPLICATION);

wc.hCursor=LoadCursor(NULL,IDC_CROSS);




22/62


RegisterClass(&wc);

hwnd=CreateWindow(szAppName, Key Events",

WS_OVERLAPPEDWINDOW, 10,10,400,300, HWND_DESKTOP,

NULL, hInstance, 0 );


UpdateWindow(hwnd);


{

TranslateMessage(&msg);


}

return msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAMwParam, LPARAM lParam)

{

switch(message)

{

case WM_KEYDOWN:

MessageBox(hwnd,"Key Down Event,

EVENTS",MB_OK);

return 0;

case WM_KEYUP:

MessageBox( hwnd,"Key Up Event","EVENTS",MB_OK);

return 0;

case WM_DESTROY:

PostQuitMessage(0);

return 0;

}

return DefWindowProc(hwnd,message,wParam,lParam);

}

SAMPLE OUTPUT:


23/62

Viva Questions :

1. Give some keyboard messages ?

2. Define Menu ?

3. State the various mapping modes ?

4. Mention some child window controls ?

5. Give any four VC++ components ?

Ex. No: 08 MOUSE EVENTS - PIXELS CONNECTING

PROGRAM

OBJECTIVE:


24/62

To write a VC++ program to connect no. of pixels using basic mouse

events.

PROCEDURE:




box.




Step 7: Click OK



CODING:

#include

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM)

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

PSTR szCmdLine, int iCmdShow)

{

static TCHAR szAppName[] = TEXT ("SARAN") ;

HWND hwnd ;MSG msg ;

WNDCLASS wc ;

wc.style = CS_HREDRAW | CS_VREDRAW ;

wc.lpfnWndProc= WndProc ;

wc.cbClsExtra= 0 ;

wc.cbWndExtra = 0 ;


25/62

wc.hInstance= hInstance ;

wc.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;

wc.hCursor= LoadCursor (NULL, IDC_ARROW) ;

wc.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;

wc.lpszMenuName = NULL ;

wc.lpszClassName = szAppName ;

RegisterClass (&wc);

hwnd=CreateWindow(szAppName,TEXT("MouseConnect"),

WS_OVERLAPPEDWINDOW,

100,100,500,300,NULL,NULL,hInstance,NULL) ;

ShowWindow (hwnd, iCmdShow) ;

UpdateWindow (hwnd) ;

while (GetMessage (&msg, NULL, 0, 0))

{

TranslateMessage (&msg);DispatchMessage (&msg);

}

return msg.wParam ;

}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM


{

static POINT pt[1000] ;

static int iCount ;

HDC hdc ;

int i, j ;

PAINTSTRUCT ps ;

HPEN hpen;

switch (message)

{

case WM_LBUTTONDOWN:

iCount = 0 ;

InvalidateRect (hwnd, NULL, TRUE);return 0 ;

case WM_MOUSEMOVE:

if (wParam & MK_LBUTTON && iCount < 1000)

{

pt[iCount ].x = LOWORD (lParam) ;

pt[iCount++].y = HIWORD (lParam) ;


26/62

hdc = GetDC (hwnd) ;

SetPixel (hdc, LOWORD (lParam), HIWORD

(lParam),RGB(255,0,0)) ;

ReleaseDC (hwnd, hdc) ;

}

return 0 ;

case WM_LBUTTONUP:

InvalidateRect (hwnd, NULL, FALSE) ;

return 0 ;

case WM_PAINT:

hdc=GetDC(hwnd);

hdc = BeginPaint (hwnd, &ps) ;

hpen=CreatePen(PS_DOT,1,RGB(255,0,0));

SelectObject(hdc,hpen);

for (i = 0 ; i < iCount - 1 ; i++)for (j = i + 1 ; j < iCount ; j++)

{

MoveToEx (hdc, pt[i].x, pt[i].y, NULL) ;

LineTo (hdc, pt[j].x, pt[j].y) ;

}

DeleteObject(SelectObject(hdc,GetStockObject(BLACK_PEN)));

EndPaint (hwnd, &ps) ;

return 0 ;

case WM_DESTROY:

PostQuitMessage (0) ;

return 0 ;

}

return DefWindowProc (hwnd, message, wParam, lParam) ;

}

SAMPLE OUTPUT:


27/62

Viva Questions:

1. Give any four GDI functions ?

2. List out different action done by mouse ?

3. Define GDI ?

4. What is Raster Font ?

5. Define Vector devices ?


28/62

Ex. No: 09 MFC APPWIZARD - ELLIPSE DRAWING

OBJECTIVE:

. To Write a VC++ Program Using MFC to toggle the color of the ellipse

between Black & Gray.

PROCEDURE:

Step 1: Run the MFCAppwizard(exe).

Step 2: Select Single Document Application.

Step 3: Add the following Variables as private to the View Class.

int m_nColor.

CRect m_rectEllipse .

Step 4: Use Class Wizard to add Message Handle for

OnLButtondown to the

view Class .Edit The Code of OnLButtondown as

void CColor_EllipseView::OnLButtondown(UINT nFlags,CPoint point)

{

if (m_rectEllipse.ptInRect(point))

{

if(m_nColor ==GRAY_BRUSH)

{

m_nColor = BLACK_BRUSH;

}

else

{m_nColor = GRAY_BRUSH;

}

InvalidateRect(m_rectEllipse);

}

}


29/62

Step 5: Edit the Constructor of the View Class to set the initial Value.

CColor_EllipseView::CColor_EllipseView():m_rectEllipse(0,0,200,200)

{

m_nColor = GRAY_BRUSH;

}

Step 6: Edit The OnDraw Member function Of the View Class.

VoidCColor_EllipseView::OnDraw(CDC *pDC)

{pDC->SelectStockObject(m_nColor);

pDC->Ellipse(m_rectEllipse);

}

Step 7: Build and Run the application.


30/62

SAMPLE OUTPUT :

Viva Questions :

1. What is the use of Invalidate() function ?

2. Which is the base class for all windows operation ?

3. Explain OnPaint() ?

4. What is OnDraw() ?

5. Differentiate CWindowDC () and CClientDC() ?

Ex. No: 10 DIALOG BASED APPLICATIONS-SIMPLE

ARITHMETIC CALCULATOR


31/62

OBJECTIVE:

To develop a dialog based application for performing simple arithmetic

operations.

PROCEDURE:


Step 2: Select the Dialog based application in step1 and accepts the

default values for remaining steps(step 2 to step 6) .

Step 3: Add the following controls using to the dialog using control

palette.

Control Control ID Caption

Edit Box IDC_NUM1 -

Edit Box IDC_NUM2 -

Edit Box IDC_RES -

Static Text IDC_STATIC INPUT A

Static Text IDC_STATIC INPUT B

Static Text IDC_STATIC RESULT

Push Button IDC_CALC CalcPush Button IDC_CLEAR Clear

Radio

Button

IDC_ADD(Set the

Group Property)Addition

Radio

ButtonIDC_SUB Subtraction

Radio

ButtonIDC_MUL Multiplication

Radio

buttonIDC_DIV Division

Step 4: Use Class Wizard to add member variables to the following

Controls.

C Control IDVariable

NameType


32/62

IDC_NUM1 m_numa Int

IDC_NUM2 m_numb Int

IDC_NUM3 m_res Int

Step 5: Use Class Wizard to add member functions to thefollowing controls

Control ID Message(Event) Function Name

IDC_RESULT BN_CLICKED OnResult( )

IDC_CLEAR BN_CLICKED OnClear( )

Step 6: Edit OnCalc() function to include the following

void CSimpleCalcDlg::OnCalc()

{

int choice;

m_numa=GetDlgItemInt(IDC_NUM1);

m_numb=GetDlgItemInt(IDC_NUM2);

choice=GetCheckedRadioButton(IDC_ADD,IDC_DIV);

switch(choice)

{

case IDC_ADD: m_res=m_numa+m_numb; break;case IDC_SUB: m_res=m_numa-m_numb; break;

case IDC_MUL: m_res=m_numa*m_numb; break;

case IDC_DIV:

if(m_numb==0)

MessageBox("Divide By Zero Error,

"ERROR",MB_OK+MB_ICONERROR);

else

m_res=m_numa/m_numb;

break;

}UpdateData(false);

}

Step 7: Edit the OnClear() member function to include the following

void CSimpleCalcDlg::OnClear()


33/62

{

SetDlgItemInt(IDC_NUM1,0);

SetDlgItemInt(IDC_NUM2,0);

SetDlgItemInt(IDC_RES,0);

}


SAMPLE OUTPUT:


34/62

Viva Questions:

1. How does parent and child window communicates ?

2. List some common dialog controls ?

3. Define class wizard ?

4. Differentiate model and modal less dialog control ?

5. Give the syntax of switch case statement ?


35/62

Ex No: 11 MFC APPWIZARD-TOOLBAR

OBJECTIVE:

. To Write a VC++ Program Using MFC to display the toolbar.

PROCEDURE:



Step 3: use the resource editor to edit the applications main menu

MENU CAPTION COMMAND ID

Draw Circle ID_DRAW_CIRCLEDraw Square ID_DRAW_SQUARE

Draw Pattern ID_DRAW_PATTERN

Step 4: use the resorce editor to update the applications toolbar.

Step 5: using class wizard view the message handlers:

OBJECT ID MESSAGEMEMBER

FUNCTIONSID_DRAW_CIRCLE COMMAND OnDrawCircle

ID_DRAW_CIRCLE UPDATE_COMMAND_UI OnUpdateDrawCircle

ID_DRAW_PATTERN COMMAND OnDrawPattern

ID_DRAW_PATTERN UPDATE_COMMAND_UI OnUpdateDrawPattern

ID_DRAW_SQUARE COMMAND OnDrawSquare

ID_DRAW_SQUARE UPDATE_COMMAND_UI OnUpdateDrawSquare

Step 6: Add the three data members to the CTool view class:

Private:

CRect m_rect;

BOOL m_bCircle

BOOL m_bPattern;

Step 7: Edit the Constructor of the View Class to set the initial Value.


36/62

CToolbarView::CToolbarView():m_rect(0,0,100,100)

{

m_bCircle=TRUE;

m_bPattern=FALSE;

}

Step 8: Edit The OnDraw Member function Of the View Class.

void CToolbarView::OnDraw(CDC* pDC)

{

CBrush brush(HS_BDIAGONAL,0L);

if(m_bPattern)

{pDC->SelectObject(&brush);

}

else

{

pDC->SelectStockObject(WHITE_BRUSH);

}

if (m_bCircle)

{

pDC->Ellipse(m_rect);

}

else

{

pDC->Rectangle(m_rect);

}

pDC->1SelectStockObject(WHITE_BRUSH);

}

Step 9: Add the coding for the message handler functions

void CToolbarView::OnDrawCircle()

{

m_bCircle=TRUE;

m_rect += CPoint(25,25);

InvalidateRect(m_rect);


37/62

}

void CToolbarView::OnUpdateDrawCircle(CCmdUI* pCmdUI)

{

pCmdUI->Enable(!m_bCircle);

}

void CToolbarView::OnDrawSquare()

{

m_bCircle=FALSE;

m_rect += CPoint(25,25);

InvalidateRect(m_rect);}

void CToolbarView::OnUpdateDrawSquare(CCmdUI* pCmdUI)

{

pCmdUI->Enable(m_bCircle);

}

void CToolbarView::OnDrawPattern()

{

m_bPattern ^=1;

}

void CToolbarView::OnUpdateDrawPattern(CCmdUI* pCmdUI)

{

pCmdUI->SetCheck (m_bPattern);

}



38/62

SAMPLE OUTPUT:

Viva Questions :

1. What is toolbar ?

2. List the various styles of toolbar state ?

3. How to load the toolbar manually ?

4. Mention the classes generated by AppWizard ?

5. What is the use of pCmdUI ?


39/62

Ex No: 12 MFC APPWIZARD-STATUSBAR

OBJECTIVE:

. To Write a VC++ Program Using MFC to display the statusbar.

PROCEDURE:



Step 3: Use the string editor to edit the applications string table

resource.

String ID String Caption

ID_INDICATOR_LEFT LEFTID_INDICATOR_RIGHT RIGHT

Step 4: Use Visual c++ to edit the applications symbols.

Choose Resource symbols from the View menu.Add the new

status bar identifier,ID_MY_STATUSBAR,and

accept the default value.

Step 5: Use Classwizard to add view menu command handlers in the

class CMainFrame.Object ID Message Member Function

ID_VIEW_STATUS_BAR COMMAND OnViewStatusBar

ID_VIEW_STATUS_BAR UPDATE_COMMAND_UI OnUpdateViewStatusBar

Step 6: Add the following function prototypes to MainFrm.h.

afx_msg void OnUpdateLeft(CCmdUI * pCmdUI);

afx_msg void OnUpdateRight(CCmdUI * pCmdUI);

Step 7: Edit the MainFrm.cpp file

Static UINT indicator[]=

{

ID_SEPARATOR,


40/62


41/62

Step 10:Edit the following View menu functions that class wizard originally

generated in MainFrame.cpp.void CMainFrame::OnViewStatusBar(){

m_wndStatusBar.ShowWindow((m_wndStatusBar.GetStyle()&WS_VISIBLE)==0);

RecalcLayout();

}

void CMainFrame::OnUpdateViewStatusBar(CCmdUI* pCmdUI)

{

pCmdUI->SetCheck((m_wndStatusBar.GetStyle() & WS_VISIBLE) !=0);

}

Step 11: Edit the OnDraw function in Ex14bview.cpp.

void Ex14bview::OnDraw(CDC *pDC)

{

pDC->TextOut(0,0,Watch the status bar while you move and click

the mouse:);

}

Step 12:Build and Run the application.


42/62

SAMPLE OUTPUT :

Viva Questions :

1. What is status bar ?

2. What is the use of ID_SEPARATOR ?

3. What is the base class for status bar ?

4. What are the types of text panes ?5. How to add new status bar ?


43/62

Ex. No: 13 CREATION OF MENU, TOOLBAR BUTTONS,

ACCELERATORS & TOOLTIP

OBJECTIVE:

To write a VC++ program to illustrate the creation and working of

menu, tools, accelerator and tool tip

PROCEDURE:

Step1: Run the MFCAppWizard(exe) and select SDI application.

Step2: Add the menu items as per shown in below using the menu resource editor.

Main Menu: Graphics Line(Popup Menu)

Horizontal Line

Vertical Line

Ellipse

Circle

RoundRect

Rectangle

Main Menu: Color

Brush Color

Pen Color

Step3: Using Properties Dialog assign the ID for all the sub menu items as

Menu

Caption

Menu ID Prompt

Horizontal

Line

ID_GRAPH_HORZLINE Horizontal Line\n

HorzLine

Vertical

Line

ID_GRAPH_VERLINE

Draws Vertical lineEllipse ID_GRAPH_ELLIPSE Draws Ellipse\n Ellipse

Tool

Circle ID_GRAPH_CIRCLE This is circle menu

RoundRect ID_GRAPH_ROUNDRECT Displays Round

Rectangle

Rectangle ID_GRAPH_RECT This is rectangle


44/62

Brush Color ID_COLOR_BRUSH Selects Brush Color

Pen Color ID_COLOR_PEN Selects Pen Color

NOTE: The Prompt strings are displayed at status bar whenever user points the

menu

item. The string after the \n(new line char) is shown as tool tip when the

user

points the corresponding tool.

Step 4: Declare the enumerated data type named as Graphics in the __view.cpp

file.

enum Graphics{LINE,VERLINE,HORILINE, CIRCLE,

RECTANGLE, ROUNDRECT,ELLIPSE};

Step 5: Add the member variable for enumerated data type Graphics named asshape in

View class.

enum Graphics shape;

Step 6: Add the following member variables for storing pen and brush color type

to the

View class.

private:

COLORREF PenColor;

COLORREF BrushColor;

Step 7: Using Class wizard add the COMMAND Event handlers to all the sub

menu

items.

void CMenucolorView::OnGraphEllipse()

{

shape=ELLIPSE;

Invalidate();

}

void CMenucolorView::OnGraphHorzline(){

shape=HORILINE;

Invalidate ();

}

void CMenucolorView::OnGraphRectangle()

{


45/62

shape=RECTANGLE;

Invalidate();

}

void CMenucolorView::OnGraphRoundRect()

{

shape=ROUNDRECT;

Invalidate();

}

void CMenucolorView::OnGraphCircle()

{

shape=CIRCLE;

Invalidate();

}

void CMenucolorView::OnGraphVerline()

{shape=VERLINE;

Invalidate();

}

void CMenucolorView::OnColorBrush()

{

CColorDialog c;

if(c.DoModal()==1)

{

Brushcolor=c.GetColor();

Invalidate();

}

}

void CMenucolorView::OnColorPen()

{

CColorDialog c;

if(c.DoModal()==1)

m_ncolor=c.GetColor();Invalidate();

}

Step 9: Edit the OnDraw() function of the View Class to draw the various shapes.

void CMenucolorView::OnDraw(CDC* pDC)

{


46/62

CPen pen;

pDC->SelectObject(new CBrush(m_ncolor1));

pen.CreatePen(PS_SOLID,2,m_ncolor);

pDC->SelectObject(&pen);

switch(shape)

{

case ELLIPSE:

pDC->Ellipse(10,10,200,150);

break;

case CIRCLE:

pDC->Ellipse(10,10,200,200);

break;

case RECTANGLE:

pDC->Rectangle(10,10,200,150);

break;case VERLINE:

pDC->MoveTo(10,10);

pDC->LineTo(10,100);

break;

case HORILINE:

pDC->MoveTo(10,10);

pDC->LineTo(100,10);

break;

case ROUNDRECT:

pDC->RoundRect(10,10,200,150,25,25);

break;

}

}

Step10: Creation of toolbar buttons for the menu items

Select Resource View Pane from the workspace window.

Select Toolbar folder & Double click IDR_MAINFRAME. It Opens tool

editor. Click the blank tool button and design the tool icon using the bitmap

shown.

Double Click the tool button to open the property box. In that select the

menu id to which you want to assign the tool.


47/62

Step11: Creation of Accelerator keys for sub menu items

Select Resource View Pane from the workspace window.

Select Accelerator folder & Double click IDR_MAINFRAME. It shows

accelerator list. In which select blank entry and double click it add newone.

In the appeared Accel Properties do the following

o Select the Modifiers( ie Ctrl | Alt)

o Enter the char in the key text box.( ie if you want Ctrl+W as a

Accel, select Ctrl Modifier and type W in the key text box.

o Select the menu ID to which you want to assign a accelerator key

from the ID combo box.

Step12: Build and Run the application.

SAMPLE OUTPUT:


48/62

Viva Questions :

1. Define Menu ?

2. What is popup menu ?

3. What is tooltip ?4. Define accelerator ?

5. What is the use of CDC ?


49/62

Ex. No: 14 DLL CREATION FOR ADDITION AND

SUBTRACTION

OBJECTIVE:

To Write a VC++ Program to create the Regular DLL for addition and

subtraction of two numbers.

PROCEDURE:

DLL CREATION

Step 1: Choose File-> New->Project tab and select MFC AppWizard(Dll).

Step 2: Enter the DLL name and press the ok button.

Step 3: Select the option Regular DLL using Shared MFCDLL from the

MFCAppWizard(exe) dialog box appears.


Step 5: Write the export function declaration in the dll header file

__declspec(dllexport) int WINAPI Add(int a,int b);

__declspec(dllexport) int WINAPI Sub(int a,int b);

Step 6: Include the definition of export functions in the corresponding dll

Implementation(.cpp) file

__declspec (dllexport) int WINAPI Add (int a, int b)

{

return (a+b);}

__declspec (dllexport) int WINAPI Sub (int a, int b)

{

return (a-b);

}


50/62

Step 7: Build the application to create the *.dll program.

CLIENT PROGRAM

Step 1: Run the MFC AppWizard (exe) and select the dialog based

application.

Step 2: Include the import function declaration in the dialog header file.

__declspec(dllimport)int WINAPI Add(int a,int b);

__declspec(dllimport)int WINAPI Sub(int a,int b);

Step 3: Add the dll header file in the dlg.cpp file with the full path name.

#include "D:\AddSub_Dll\AddSub_Dll.h"

Step 4: Add the required controls.

Control

Type

Control ID Caption Member

Variable

Event

Handler

Edit Box IDC_NUM1 m_NumA -

Edit Box IDC_NUM2 m_NumB -

Static IDC_STATIC1 Number

A

- -

Static IDC_STATIC2 Number B - -

Static IDC_STATIC3 A + B - -Static IDC_STATIC4 A - B - -

Edit Box IDC_ADDRES - m_addRes -

Edit Box IDC_SUBRES - m_subRes -

Push Button IDC_BUT_ADD Press Me - BN_CLICKED


51/62

Step 5: Make the call to the import function in button control event handler

function.

void CAddSubClientDlg::OnButAdd()

{

UpdateData(true);

m_addRes=Add(m_NumA, m_NumB);

m_subRes=Sub(m_NumA, m_NumB);

UpdateData(false);

}

Step 6: Include the Dll library file using project setting option.

"D:\AddSub_Dll\AddSub_Dll\Debug\AddSub_Dll.lib"

Step 7: Copy the newly created *.dll (AddSub_Dll.dll) file in the window

system directory or debug folder of client program.

Step 8: Build and run the application program.

SAMPLE OUTPUT:


52/62

Viva Questions :

1. What is DLL ?

2. What are the advantages of DLL ?

3. Mention drawbacks of DLL ?

4. What is the use of LoadLibrary () ?

Ex. No: 15 DLL CREATION FOR SQUAREROOT AND

FACTORIAL

OBJECTIVE:To Write a VC++ Program to compute the factorial and square root of a

given number using Regular DLL.

PROCEDURE:

DLL CREATION

Step 1: Choose File-> New->Project tab and select MFC AppWzard(Dll).

Step 2: Enter the DLL name and press the ok button.

Step 3: Select the option Regular DLL using Shared MFCDLL from the

MFCAppWizard (exe) dialog box appears.


Step 5: Write the export function declaration in the dll header file

__declspec (dllexport) double SquareRoot (double a);

__declspec (dllexport) long Factorial (int a);

Step 6: Include the definition of export functions in the corresponding dll


53/62

implementation (.cpp) file

__declspec(dllexport)double SquareRoot(double a)

{

if(a


54/62

CLIENT PROGRAM

Step 1: Run the MFC AppWizard (exe) and select the dialog based

application.

Step 2: Include the import function declaration in the dialog header file.

__declspec (dllimport) double SquareRoot (double a);

__declspec (dllimport) long Factorial (int a);

Step 3: Add the dll header file in the dlg.cpp file with the full path name.

"D:\FactSqrt_Dll\FactSqrt_Dll.h"

Step 4: Add the required controls.

Control

Type

Control ID Caption Member

Variable

Event

Handler

Edit Box IDC_INPUT - m_Input -

Edit Box IDC_FACT - m_FactOut -

Edit Box IDC_SQRT - m_SqrtOut -

Static IDC_STATIC1 Input - -Static IDC_STATIC2 Factorial - -

Static IDC_STATIC3 SquareRoot - -

Push Button IDC_CALC Calc - BN_CLICKED

Step 5: Make the call to the import function in Button control event handler

function.

void CFactSqrtClientDlg::OnClick()

{

UpdateData(true);

m_SqrtOut=SquareRoot((double)m_Input);

m_FactOut=Factorial(m_Input);

UpdateData(false);


55/62

}

Step 6: Include the Dll lib file using project setting option.

D:\FactSqrt_Dll\Debug\FactSqrt_Dll.lib

Step 7: Save the newly created .dll (AddSub_Dll.dll) file in the window

system

directory or debug folder of client program.

Step 8: Build and run the application program.

SAMPLE OUTPUT:

Viva Questions :

1. What is the use of DllMain() ?

2. What is the finction used to export the dll ?

3. What do you mean by resource dll ?

4. Define regular mfc dll ?


56/62

Ex. No: 16 ODBC CONNECTIVITY EMPLOYEE DETAILS

OBJECTIVE:

To write a VC++ program to demonstrate the working of ODBC

Connectivity for a DBMS.

PROCEDURE:

Step 1: Create the following table underMicrosot Access(stud1.mdb)

Field Name Data Type

regno Number

Name Text

Mark1 Number

Mark2 Number

total Number

Step 2: Create the new ODBC Connection.

Start->Settings->Control Panel->Admiistrative Tools -> Data

Sources[ODBC]

Choose User DSN Tab from the appeared ODBC Data Source

Administrator.

Click Add Button->Select Microsoft Access driver(*.mdb) from Create

New Data Source Dialog Box.

Enter the Data Source Name and Description in ODBCD Microsoft Access

Setup Dialog Box and assign the newly created database(EmpInfo.mdb) to

the ODBC using Select Button ->Click OK Button

Step 3: Creation of Front End of Application. In VC++ Environment


57/62

Choose File Menu->New->MFCAppwizard(exe)->Enter Project Name.

In Step1 of MFC Appwizard Dialog ,select Single Document

In Step2 : Select the Database view without file support and Select thedatasource and table created under MS-Access using Datasource

Button.

Select Dynaset Option from the Record Set

Click Finish Button.

Step 4: Add the following controls to access the record field values.

Control

Type

Caption

Static Text regno

Static Text name

Static Text Mark1

Static Text

Static text

Mark2

total

Step 5: Using Class Wizard assign the record field names as member variable tofollowing controls.

Control ID Member Variable Data Type

IDC_regno ->m_regno long

IDC_NAME ->m_name CString

Control

Type

Control ID

Edit Box IDC_REGNO

Edit Box IDC_NAME

EditBox IDC_mark1

Edit Box IDC_mark2

Edit Box IDC_total

Control

Type

Control ID

Push Button IDC_ADDNEW

Push Button IDC_UPDATE

Push Button IDC_DELETE

Push Button IDC_CALC

Push Button IDC_EXIT


58/62

IDC_MARK1 ->m_mark1 long

IDC_MARK2 ->m_mark2 Long

IDC_TOTAL ->m_total long

Step 6: Using Class Wizard add the Button Click (BN_CLICKED) Event Handler

member function to the following controls( to the View class).

void CStudView::OnAddnew()

{

SetDlgItemInt(IDC_REGNO,0);

SetDlgItemText(IDC_NAME,"");

SetDlgItemInt(IDC_MARK1,0);

SetDlgItemInt(IDC_MARK2,0);

SetDlgItemInt(IDC_TOTAL,0);

}

void CStudView::OnCalculate()

{

UpdateData(true);

m_pSet->m_total=m_pSet->m_mark1+m_pSet->m_mark2;

UpdateData(false);

}

void CStudView::OnDelete()

{

int f;

try

{

f=MessageBox("R U SURE","Delete",MB_OKCANCEL);

if(f=IDOK)

{

m_pSet->Delete();

MessageBox("Records Deleted");}

}

catch(CDBException *e)

{

MessageBox(e->m_strError);

e->Delete();


59/62

}

m_pSet->MoveNext();

UpdateData(false);

}

void CStudView::OnEdit()

{

m_pSet->Edit();

UpdateData(true);

if(m_pSet->CanUpdate())

{

m_pSet->Update();

MessageBox("Records Added");

}}

void CStudView::OnUpdate()

{

m_pSet->AddNew();

UpdateData(true);

if(m_pSet->CanUpdate())

{

m_pSet->Update();

MessageBox("Record updated");

}

if(!m_pSet->IsEOF())

m_pSet->MoveLast();

UpdateData(false);

}

SAMPLE OUTPUT:


60/62


61/62


62/62

Viva Questions :

1. Define ODBC ?

2. List the three main classes provided by MFC for database ?

3. What is the use of CRecordView class ?

4. Differentiate Snapshot and Dynaset ?

5. What should be done to refresh a record set ?

VP Lab 1-16 Programs

Documents

Transcript of VP Lab 1-16 Programs