#include<Windows.h>

 #include<WinUser.h>

 #include<tchar.h>

 #include<stdio.h>

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

 int WinMain(HINSTANCE hInst, HINSTANCE tmp, LPSTR szCmd, int nShow)

 {

     WNDCLASS WndClass;

     TCHAR* ClassName = TEXT("MyClass");

     HWND hwnd;

     MSG msg;

     WndClass.cbClsExtra = ;

     WndClass.cbWndExtra = ;

     WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + );

     WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);

     WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);

     WndClass.hInstance = hInst;

     WndClass.lpfnWndProc = WindProc;

     WndClass.lpszClassName = ClassName;

     WndClass.lpszMenuName = NULL;

     WndClass.style = CS_VREDRAW | CS_HREDRAW;

     RegisterClass(&WndClass);

     hwnd = CreateWindow(ClassName, TEXT("Hello"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, , , NULL, NULL, hInst, NULL);

     ShowWindow(hwnd, nShow);

     UpdateWindow(hwnd);

     while (GetMessage(&msg, NULL, , ))

     {

         TranslateMessage(&msg);

         DispatchMessage(&msg);

     }

     return ;

 }

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

 {

     HDC hdc;

     PAINTSTRUCT pt;

     TCHAR *rectwords = TEXT("我在学习鼠标消息");

     static int i;

     switch (message)

     {

     case WM_CREATE:

         return ;

     case WM_SIZE:

         return ;

     case WM_PAINT:

         hdc = BeginPaint(hwnd, &pt);

         Rectangle(hdc, , , , );

         if (i)

         {

             TextOut(hdc, , , rectwords, _tcslen(rectwords));

         }

         EndPaint(hwnd, &pt);

         return ;

     case WM_CHAR:

         return ;

     case WM_LBUTTONUP:

         i = ;

         InvalidateRect(hwnd, NULL, TRUE);

         return ;

     case WM_LBUTTONDOWN:

         InvalidateRect(hwnd, NULL, TRUE);

         if (LOWORD(lParam)> && LOWORD(lParam)< && HIWORD(lParam)> && HIWORD(lParam)<)

         {

             i = ;

         }

         return ;

     case WM_MOUSEMOVE:

         hdc = GetDC(hwnd);

         if (wParam&MK_LBUTTON)

         {

             SetPixel(hdc, LOWORD(lParam), HIWORD(lParam), );

         }

         ReleaseDC(hwnd, hdc);

         return ;

     case WM_DESTROY:

         PostQuitMessage();

         return ;

     default:

         break;

     }

     return DefWindowProc(hwnd, message, wParam, lParam);

 }