Windows program-Mouse Event-1(win32)

MOUSE EVENT I

Program:

MouseEvents.C

#include <windows.h>

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

int WINAPI WinMain ( HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow )

{

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

HWND hwnd;

MSG msg;

// DECLARING AND INTIAZING THE WINDOW CLASS

WNDCLASS wc;                                                       // Window class declaration

wc.style = CS_HREDRAW| CS_VREDRAW;        // Window style

wc. lpfnWndProc = WndProc;                                   // Window Procedure

wc.cbClsExtra = 0;                                                     // Extra Parameters

wc.cbWndExtra = 0;                                                   // Extra Parameters

wc.hInstance = hInstance;                                          // Instance handle

wc.hIcon = LoadIcon (NULL, IDI_APPLICATION); // Icon

wc.hCursor = LoadCursor (NULL, IDC_ARROW);            // Window Cursor

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

                                                                                    // Set Background Color

wc.lpszMenuName = NULL;                                     // Menu Handle

wc.lpszClassName = szAppName;                             // Class Name

// REGISTERING THE WINDOW CLASS

if (!RegisterClass (&wc))

{

            MessageBox(NULL, TEXT("This program requires WindowsNT!"), szAppName, MB_ICONERROR);

            return 0;

}

// CREATING THE WINDOW

hwnd = CreateWindow ( szAppName,                                  // window class name

TEXT("The Hello Program"), // window caption 

WS_OVERLAPPEDWINDOW,      // window style

CW_USEDEFAULT,                                    // initial x position

CW_USEDEFAULT,                                    // initial x position

CW_USEDEFAULT,                                    // initial x position

CW_USEDEFAULT,                                    // initial x position

NULL,                                                            // parent window handle

NULL,                                                            // window menu handle

hInstance,                                          //program instance handle

NULL);                                               // creation parameters

// DISPLAYING THE WINDOW

            ShowWindow (hwnd, iCmdShow);              

            UpdateWindow (hwnd);

// PROCESSING THE MESSAGE LOOP

                                    while (GetMessage(&msg,NULL,0,0))          // extracts message from Message Queue

{

                        TranslateMessage (&msg);

                        DispatchMessage (&msg);                  // dispatches the message received

            }

            return msg.wParam;

}

// WINDOW PROCEDURE FUNCTION

LRESULT CALLBACK WndProc (HWND hwnd,UINT message,WPARAM wparam,LPARAM lparam)

{

            char left[]="How are u?";

            char right[]="Hello";

            switch (message)

            {

            case WM_LBUTTONDOWN:           // Left mouse button press message

                        MessageBox(GetFocus(),left,"Left Mouse Button Pressed",MB_OK);

                        return 0;

            case WM_RBUTTONDOWN:          // Right mouse button press message

                        MessageBox(GetFocus(),right,"Right Mouse Button Pressed",MB_OK);

                        return 0;

            case WM_DESTROY:                       // used to close the window

                        PostQuitMessage(0);               // used to terminate while loop in WinMain()

                        return 0;

            }

            return DefWindowProc(hwnd,message,wparam,lparam);

}

Sample Output: