C++编程 windows窗口程序和矩阵类程序

答案：就会第一题，第二题的GUI没有研究，以下是C++程序代码：
 #include <windows.h>
  
    HDC hdc;
 PAINTSTRUCT ps;
 RECT rect;
  
LRESULT CALLBACK WndProc (HWND,
  
  
UINT,
  
  
WPARAM,
  
  
LPARAM) ;
  
    int WINAPI WinMain (HINSTANCE hInstance,
  
  HINSTANCE hPrevInstance,
  
  
  
  
  
PSTR szCmdLine,
  
  int nCmdShow)
  
{ 
  
static TCHAR szAppName []="applicaiton";
  HWND hwnd;
  WNDCLASS wndcls;
  MSG msg;
  wndcls.cbClsExtra=0;
  wndcls.cbWndExtra=0;
  wndcls.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
  wndcls.hCursor=LoadCursor(NULL,IDC_ARROW);
  wndcls.hIcon=LoadIcon(NULL,IDI_APPLICATION);
  wndcls.hInstance=hInstance;
  wndcls.lpfnWndProc=WndProc;
  wndcls.lpszMenuName=NULL;
  wndcls.lpszClassName=szAppName;
  wndcls.style=CS_HREDRAW|CS_VREDRAW;
  if(!RegisterClass(&wndcls))
  {
   MessageBox(NULL,"Error","error",MB_ICONERROR);
   return 0;
  }
  hwnd=CreateWindowEx(WS_EX_TOPMOST,
   szAppName,
   "windows窗口程序Demo",
   WS_OVERLAPPEDWINDOW,
   0,0,
   400,300,
   NULL,NULL,
   hInstance,
   NULL);
  ShowWindow(hwnd,nCmdShow);
  UpdateWindow(hwnd);
  
  DWORD start_time;
  while(true)
  {
  
 hdc=GetDC(hwnd);
   start_time=GetTickCount();
  
    if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
  
   { if(msg.message==WM_QUIT)
   break;
   TranslateMessage(&msg);
   DispatchMessage(&msg);
    }
   GetClientRect (hwnd, &rect) ;
  
  FillRect(hdc,&rect,CreateSolidBrush(RGB(rand()%255,rand()%255,rand()%255)));
   while(GetTickCount()-start_time<250)
   {}
  
ReleaseDC(hwnd,hdc);
  }
  return msg.wParam;
 }
 LRESULT CALLBACK WndProc (HWND hwnd, UINT msg, WPARAM wapram, LPARAM lapram)
  {
  switch(msg)
  {
  
   case  WM_PAINT:
    {
    hdc = BeginPaint (hwnd, &ps) ;
  
  
  
  
  GetClientRect (hwnd, &rect) ;
  
   FillRect(hdc,&rect,CreateSolidBrush(RGB(rand()%255,rand()%255,rand()%255)));
    EndPaint (hwnd, &ps) ;
  
   return 0;
  
} 
  break;
  case  WM_DESTROY:
  
  {
    PostQuitMessage (0) ;
  
   return 0 ;
   }
   break;
  
} 
  
   return DefWindowProc (hwnd, msg, wapram, lapram) ;
  
} 
    注意：最后在菜单栏选择工程->设置->链接,或者快捷键 alt+F7，调出对话框，将工程选项的subsystem:console的console改为windows，嘿嘿！！！
 搞定，运行即可。哈哈
  由于这个程序使用的是GDI函数直接调用，没有优化，比较占资源，刚开始反映可能会有些迟钝。

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