mousehook.c

   1 #include <windows.h>
   2 #include <windowsx.h>
   3 #include <stdio.h>
   4
   5 #define BUTTON_ID1 0
   6 #define BUTTON_ID2 1
   7
   8 HMODULE hModule;
   9 void (__stdcall *SetHook)(HINSTANCE hModule);
  10 void (__stdcall *RemoveHook)();
  11
  12 LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
  13 {
  14     HDC hdc;
  15     PAINTSTRUCT ps;
  16     static HWND hStartButton;
  17     static HWND hEndButton;
  18
  19     switch(msg) {
  20     case WM_DESTROY:
  21         PostQuitMessage(0);
  22         return 1;
  23
  24     case WM_COMMAND:
  25         switch(LOWORD(wParam)) {
  26             case BUTTON_ID1:
  27                 SetHook(hModule);
  28                 break;
  29
  30             case BUTTON_ID2:
  31                 RemoveHook();
  32                 break;
  33         }
  34         break;
  35
  36     case WM_CREATE:
  37         hStartButton = CreateWindow(
  38                     TEXT("BUTTON"), TEXT("Start"),
  39                     WS_CHILD | WS_VISIBLE |BS_PUSHBUTTON,
  40                     0, 0, 100, 50, hWnd, (HMENU)BUTTON_ID1,
  41                     ((LPCREATESTRUCT)(lParam))->hInstance, NULL);
  42         hEndButton = CreateWindow(
  43                     TEXT("BUTTON"), TEXT("End"),
  44                     WS_CHILD | WS_VISIBLE |BS_PUSHBUTTON,
  45                     100, 0, 100, 50, hWnd, (HMENU)BUTTON_ID2,
  46                     ((LPCREATESTRUCT)(lParam))->hInstance, NULL);
  47     }
  48     return DefWindowProc(hWnd, msg, wParam, lParam);
  49 }
  50
  51 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
  52             PSTR lpCmdLine, int nCmdShow)
  53 {
  54     hModule = LoadLibrary("mousehook_lib.dll");
  55     if(hModule == NULL) {
  56         fprintf(stderr, "not found mousehook_lib.dll");
  57         exit(1);
  58     }
  59
  60     SetHook = (void (__stdcall *)(HINSTANCE)) (HINSTANCE)GetProcAddress(hModule, "SetHook");
  61     RemoveHook = (void (__stdcall *)()) (HINSTANCE)GetProcAddress(hModule, "RemoveHook");
  62
  63     HWND hWnd;
  64     MSG msg;
  65     WNDCLASS winc;
  66
  67     winc.style = CS_HREDRAW | CS_VREDRAW;
  68     winc.lpfnWndProc = WndProc;
  69     winc.cbClsExtra = winc.cbWndExtra = 0;
  70     winc.hInstance = hInstance;
  71     winc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
  72     winc.hCursor = LoadCursor(NULL, IDC_ARROW);
  73     winc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
  74     winc.lpszMenuName = NULL;
  75     winc.lpszClassName = TEXT("mousehook");
  76
  77     if(!RegisterClass(&winc)) {
  78         fprintf(stderr, "RegisterClass\n");
  79         return 1;
  80     }
  81
  82     hWnd = CreateWindow(
  83         TEXT("mousehook"), TEXT("Kitty on your lap"),
  84         WS_OVERLAPPEDWINDOW | WS_VISIBLE,
  85         CW_USEDEFAULT, CW_USEDEFAULT,
  86         300, 300,
  87         NULL, NULL, hInstance, NULL);
  88
  89     if(hWnd == NULL) {
  90         fprintf(stderr, "CreateWindow\n");
  91         return 1;
  92     }
  93
  94     while(GetMessage(&msg, NULL, 0, 0)) {
  95         TranslateMessage(&msg);
  96         DispatchMessage(&msg);
  97     }
  98
  99     return msg.wParam;
 100 }