标准的一个windows程序框架

#ifndef UNICODE
#define UNICODE
#endif
#include <Windows.h>
LRESULT CALLBACK WindowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam);
int WINAPI wWinMain(HINSTANCE hInstance,HINSTANCE ,PWSTR pCmdLine,int nCmdShow)
{
 //register the window class
 const wchar_t CLASS_NAME[]=L"Sample Window Class";
 WNDCLASS wc={ };
 wc.lpfnWndProc=WindowProc;
 wc.hInstance=hInstance;
 wc.lpszClassName=CLASS_NAME;
 RegisterClass(&wc);
 //create the window
 HWND hwnd=CreateWindowEx(
  0,           //optional window style
  CLASS_NAME,   //window class
  L"Learn to Program Windows",  //window class
  WS_OVERLAPPEDWINDOW,  //window style
  //size and position
  CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
  NULL,    //parent window
  NULL ,     //menu
  hInstance,  //instance handle
  NULL      //additional application data
  );
 if(hwnd==NULL)
 {return 0;}
 ShowWindow(hwnd,nCmdShow);
 UpdateWindow(hwnd);
 //run the message loop
 MSG msg={ };
 while(GetMessage(&msg,NULL,0,0))
 {
  TranslateMessage(&msg);
  DispatchMessage(&msg);
 }
 return 0;
}
LRESULT CALLBACK WindowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
 switch(uMsg)
 {
 case WM_DESTROY:
  PostQuitMessage(0);
  return 0;
 case WM_PAINT:
  {
   PAINTSTRUCT ps;
   HDC hdc=BeginPaint(hwnd,&ps);
   FillRect(hdc,&ps.rcPaint,(HBRUSH)(COLOR_WINDOW+1));
   EndPaint(hwnd,&ps);
  }
  return 0;
 }
 return DefWindowProc(hwnd,uMsg,wParam,lParam);
}