学步园

        要创建窗口，首先需要注册一个窗口类，而窗口类又需要窗口过程来处理窗口消息

#include <windows.h>
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);  // 窗口过程
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int iCmdShow)
{
 static TCHAR szAppName[] = TEXT("Hello Windows");
 HWND hwnd;
 MSG msg;
 WNDCLASS wndclass;
 
 // 以下是窗口类
 wndclass.style = CS_HREDRAW|CS_VREDRAW;  
 wndclass.lpfnWndProc = WndProc;  // 窗口过程
 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;
 
 // 注册窗口类
 if ( !RegisterClass(&wndclass))
 {
  MessageBox(NULL,TEXT("This programe requires Windows NT!"),szAppName,MB_ICONERROR);
  return 0;
 }
 
 // 创建窗口
 hwnd = CreateWindow(szAppName,szAppName,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL);
 
 // 显示窗口
 ShowWindow(hwnd,iCmdShow);
 // 更新窗口
 UpdateWindow(hwnd);
 
 // 消息循环
 while(GetMessage(&msg,NULL,0,0))
 {
  TranslateMessage(&msg);
  DispatchMessage(&msg);
 }
 return msg.wParam;
}
// 窗口过程
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 An,Welcome to the world of Windows!"),
   -1,
   &rect,
   DT_SINGLELINE|DT_CENTER|DT_VCENTER);
  EndPaint(hwnd,&ps);
  return 0;
 case WM_DESTROY:
  PostQuitMessage(0);
  return 0;
 }
 return DefWindowProc(hwnd,message,wParam,lParam); // 其他时间的默认处理方法,必须要有
}
        以下是运行截图：