main( int argc, char *argv[ ], char *envp[ ] )。

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

#include <windows.h>     //1:必须包含头文件windows.h

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; //2:声明窗口过程函数

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

                    PSTR szCmdLine, int iCmdShow)     //3：windows应用程序的入口函数

{

     static TCHAR szAppName[] = TEXT ("HelloWin") ;   //4：定义窗口类型名变量

     HWND         hwnd ;                           //5：定义窗口句柄

     MSG          msg ;                             //6：定义消息结构体对象

     WNDCLASS     wndclass ;                       //7：定义要注册的窗口结构体

     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;   //8： 窗口风格

     wndclass.lpfnWndProc   = WndProc ;                       //9： 窗口过程函数

     wndclass.cbClsExtra    = 0 ;                       //10：该类型窗口的附加内存

     wndclass.cbWndExtra    = 0 ;                      //11：窗口对象的附加内存

     wndclass.hInstance     = hInstance ;   //12：窗口的应用程序实例句柄（产生窗口时有操作系统生成）

     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ; //13：应用程序图标

     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;    //14：应用程序光标

     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;//15：应用程序背景刷

     wndclass.lpszMenuName  = NULL ;                  //16：应用程序菜单

     wndclass.lpszClassName = szAppName ;               //17：窗口类型

     if (!RegisterClass (&wndclass))           //18：在操作系统中注册第7~17步中定义的窗口类型

     {

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

                      szAppName, MB_ICONERROR) ;

          return 0 ;

     }

     hwnd = CreateWindow (szAppName,       //19：创建窗口，第一个参数为注册时的窗口类型名           

                       TEXT ("The Hello Program"),   //20：窗口标题

                        WS_OVERLAPPEDWINDOW, //21：窗口风格                              

                       CW_USEDEFAULT,          //22：窗口初始位置x坐标                                 

                       CW_USEDEFAULT,          //23：窗口初始位置y坐标                                  

                       CW_USEDEFAULT,          //24：窗口大小之宽度                              

                       CW_USEDEFAULT,          //25：窗口大小之高度                              

                       NULL,                     //26：父窗口句柄 

                       NULL,                     //27：窗口菜单句柄                         

                       hInstance,                   //28：应用程序实例句柄，与第12步中的一样

                       NULL                      //29：传递给窗口过程函数的lParam参数指针   

         ) ;

     ShowWindow (hwnd, iCmdShow) ;                //30：显示窗口

     UpdateWindow (hwnd) ;                         //31：更新窗口

     while (GetMessage (&msg, NULL, 0, 0))           //32：消息循环

     {

          TranslateMessage (&msg) ;                 //33：消息转换

          DispatchMessage (&msg) ;                 //34：分派消息

     }

     return msg.wParam ;

}

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

{//35：窗口过程函数，也叫回调函数

     HDC         hdc ;        //36：设备上下文句柄

     PAINTSTRUCT ps ;        //37：调用BeginPaint获取设备句柄是需要传递的参数

     RECT        rect ;        //38：矩形结构体对象

     switch (message)           //39：处理消息

     {

     case WM_CREATE:        //40：处理WM_CREATE消息

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

          return 0 ;

     case WM_PAINT:         //41：处理WM_PAINT

          hdc = BeginPaint (hwnd, &ps) ;

          GetClientRect (hwnd, &rect) ;

          DrawText (hdc, TEXT ("Hello, Windows 98!"), -1, &rect,

                    DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;

          EndPaint (hwnd, &ps) ;

          return 0 ;

     case WM_DESTROY:    //42：处理WM_DESTROY

          PostQuitMessage (0) ;   //43：发送一个WM_QUIT消息

          return 0 ;

     }

     return DefWindowProc (hwnd, message, wParam, lParam) ;  //44：调用windows默认的窗口过程函数

}