【windows程序设计】系列03:窗口与消息

//需要添加winmm.lib

#include <windows.h>

 

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;//LRESULT等价于Long



int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

                    PSTR szCmdLine, int iCmdShow)

{

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

     HWND         hwnd ;

     MSG          msg ;

     WNDCLASS     wndclass ;



     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;

     wndclass.lpfnWndProc   = WndProc ;

     wndclass.cbClsExtra    = 0 ;

     wndclass.cbWndExtra    = 0 ;

     wndclass.hInstance     = hInstance ;

     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;

     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;

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

     wndclass.lpszMenuName  = NULL ;

     wndclass.lpszClassName = szAppName ;



     if (!RegisterClass (&wndclass))

     {

          MessageBox (NULL, TEXT ("This program requires Windows NT!"), 

                      szAppName, MB_ICONERROR) ;

          return 0 ;

     }

     

     hwnd = CreateWindow (szAppName,                  // window class name

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

                          WS_OVERLAPPEDWINDOW,        // window style

                          CW_USEDEFAULT,              // initial x position

                          CW_USEDEFAULT,              // initial y position

                          CW_USEDEFAULT,              // initial x size

                          CW_USEDEFAULT,              // initial y size

                          NULL,                       // parent window handle

                          NULL,                       // window menu handle

                          hInstance,                  // program instance handle

                          NULL) ;                     // creation parameters

     

     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 wParam, LPARAM lParam)

{

     HDC         hdc ;

     PAINTSTRUCT ps ;

     RECT        rect ;

     

     switch (message)

     {

     case WM_CREATE:

          PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ;

          return 0 ;

          

     case WM_PAINT:

          hdc = BeginPaint (hwnd, &ps) ;

          

          GetClientRect (hwnd, &rect) ;

          

          DrawText (hdc, TEXT ("Hello, World!"), -1, &rect,//-1表示字符串以0结尾

                    DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;//单行，水平与垂直居中

          

          EndPaint (hwnd, &ps) ;

          return 0 ;

          

     case WM_DESTROY:

          PostQuitMessage (0) ;

          return 0 ;

     }

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

}
文中用到的HelloWin.wav下载地址：

http://files.cnblogs.com/elesos/HelloWin.rar