和鼠标相关的三个属于：click，double-click，drag
鼠标消息和键盘消息不同：只要鼠标跨越某个窗口，或者在某个窗口中按键，消息。
客户去鼠标消息
WM_MOUSEMOVE
WM_[L,M,R] BUTTONDOWN
WM_[L,M,R] BUTTONUP
WM_[L,M,R] BUTTONDBLCLK
对于这些消息，lParam的低字节为x坐标，高字节为y坐标。
wParam只是鼠标按键以及shift和Ctr1按键的状态（这个和键盘消息相似）。
要测试鼠标按钮是否按下：MK_LBUTTON，MK_MBUTTON，MK_RBUTTON，MK_SHIFT，MK_CONTROL.
非客户区鼠标消息：
WM_NCMOUS EMOVE
WM_NCLBUTTONDOWN.
WM_NCLBUTTONUP
WM_NCLBUTTONDBLCLK
1 #include<Windows.h> 2 #include<WinUser.h> 3 #include<tchar.h> 4 #include<stdio.h> 5 6 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam); 7 8 int WinMain(HINSTANCE hInst, HINSTANCE tmp, LPSTR szCmd, int nShow) 9 { 10 WNDCLASS WndClass; 11 TCHAR* ClassName = TEXT("MyClass"); 12 HWND hwnd; 13 MSG msg; 14 15 WndClass.cbClsExtra = 0; 16 WndClass.cbWndExtra = 0; 17 WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); 18 WndClass.hCursor = LoadCursor(NULL, IDC_ARROW); 19 WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION); 20 WndClass.hInstance = hInst; 21 WndClass.lpfnWndProc = WindProc; 22 WndClass.lpszClassName = ClassName; 23 WndClass.lpszMenuName = NULL; 24 WndClass.style = CS_VREDRAW | CS_HREDRAW; 25 26 RegisterClass(&WndClass); 27 hwnd = CreateWindow(ClassName, TEXT("Hello"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 500, 300, NULL, NULL, hInst, NULL); 28 ShowWindow(hwnd, nShow); 29 UpdateWindow(hwnd); 30 31 while (GetMessage(&msg, NULL, 0, 0)) 32 { 33 TranslateMessage(&msg); 34 DispatchMessage(&msg); 35 } 36 return 0; 37 } 38 39 40 41 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) 42 { 43 HDC hdc; 44 PAINTSTRUCT pt; 45 TCHAR *rectwords = TEXT("我在学习鼠标消息"); 46 static int i; 47 switch (message) 48 { 49 case WM_CREATE: 50 return 0; 51 case WM_SIZE: 52 return 0; 53 case WM_PAINT: 54 hdc = BeginPaint(hwnd, &pt); 55 Rectangle(hdc, 10, 10, 100, 100); 56 if (i) 57 { 58 TextOut(hdc, 100, 10, rectwords, _tcslen(rectwords)); 59 } 60 EndPaint(hwnd, &pt); 61 return 0; 62 case WM_CHAR: 63 return 0; 64 case WM_LBUTTONUP: 65 i = 0; 66 InvalidateRect(hwnd, NULL, TRUE); 67 return 0; 68 case WM_LBUTTONDOWN: 69 InvalidateRect(hwnd, NULL, TRUE); 70 if (LOWORD(lParam)>10 && LOWORD(lParam)<100 && HIWORD(lParam)>10 && HIWORD(lParam)<100) 71 { 72 i = 1; 73 } 74 return 0; 75 case WM_MOUSEMOVE: 76 hdc = GetDC(hwnd); 77 if (wParam&MK_LBUTTON) 78 { 79 SetPixel(hdc, LOWORD(lParam), HIWORD(lParam), 0); 80 } 81 ReleaseDC(hwnd, hdc); 82 return 0; 83 case WM_DESTROY: 84 PostQuitMessage(0); 85 return 0; 86 default: 87 break; 88 } 89 90 return DefWindowProc(hwnd, message, wParam, lParam); 91 }