VC编写的windows入口函数：WinMain(孙鑫视频所讲)

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#pragma comment(lib,"ws2_32.lib")
#pragma comment(lib,"ws2_32.lib")
LRESULT CALLBACK WinSunProc(          HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
);


int  WINAPI WinMain(         
    HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPSTR lpCmdLine,
    int nCmdShow
)
{
 WNDCLASS wndcls;
 wndcls.cbClsExtra=0;
 wndcls.cbWndExtra=0;
 wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
 wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
 wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
 wndcls.hInstance=hInstance;
 wndcls.lpfnWndProc = WinSunProc;
 wndcls.lpszClassName = "Weixin2003";
 wndcls.lpszMenuName=NULL;
 wndcls.style=CS_HREDRAW|CS_VREDRAW;
 RegisterClass(&wndcls);


 HWND hwnd;
 hwnd=CreateWindow("Weixin2003","北京维新科学技术培训中心",WS_OVERLAPPEDWINDOW,0,0,600,400,NULL,NULL,hInstance,NULL);


 ShowWindow(hwnd,SW_SHOWNORMAL);
 UpdateWindow(hwnd);


 MSG msg;
 while (GetMessage(&msg,NULL,0,0))
 {
TranslateMessage(&msg);
DispatchMessage(&msg);
 }
return 0;
 
}
LRESULT CALLBACK WinSunProc( HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
)
{
  switch(uMsg)
  {
  case WM_CHAR:
 char szChar[20];
 sprintf_s(szChar,"char is %d",wParam);
 MessageBox(hwnd,szChar,"weixin",0);
 break;
  case WM_LBUTTONDOWN:
 MessageBox(hwnd,"mouse clicked","weixin",0);
 HDC hdc;
 hdc=GetDC(hwnd);
 TextOut(hdc,0,50,"计算机编程语言培训",strlen("计算机编程语言培训"));
 ReleaseDC(hwnd,hdc);
 break;
  case WM_PAINT:
 HDC hDC;
 PAINTSTRUCT ps;
 hDC=BeginPaint(hwnd,&ps);
      TextOut(hDC,0,0,"维新培训",strlen("维新培训"));
 EndPaint(hwnd,&ps);
 break;
  case WM_CLOSE:
     if (IDYES==MessageBox(hwnd,"是否真的结束？","weixin",MB_YESNO))
     {
DestroyWindow(hwnd);
     }
 break;
  case WM_DESTROY:
 PostQuitMessage(0);
 break;
  default:return DefWindowProc(hwnd,uMsg,wParam,lParam);
  }
  return 0;
}