C#:如何捕获全局鼠标/HID事件

由于它使用windows密钥,因此可以使用热键绑定全局捕获密钥。登记处 msdn

编辑:似乎鼠标滚轮事件没有像我假设的那样被视为键,并且没有办法为它们生成全局热键。

警告:我尚未测试此代码,仅作为演示提供。

#include <windows.h>

HINSTANCE myInstance;
HHOOK thehook = 0;
BOOL isWinKeyDown = FALSE;

extern "C" LRESULT __declspec(dllexport)__stdcall CALLBACK HookHandler(int nCode, WPARAM wParam, LPARAM lParam) {
    if (nCode == WM_KEYDOWN && (wParam == VK_LWIN || wParam == VK_RWIN))
        isWinKeyDown = TRUE;
    else if (nCode == WM_KEYUP && (wParam == VK_LWIN || wParam == VK_RWIN))
        isWinKeyDown = FALSE;
    else if (nCode == WM_MOUSEHWHEEL && isWinKeyDown) {
        if (HIWORD(wParam) > 0) { //mousewheel up
            CallNextHookEx(thehook, WM_KEYDOWN, VK_ADD, 0);
            CallNextHookEx(thehook, WM_KEYUP, VK_ADD, 0);
        } else { //mousewheel down
            CallNextHookEx(thehook, WM_KEYDOWN, VK_SUBTRACT, 0);
            CallNextHookEx(thehook, WM_KEYUP, VK_SUBTRACT, 0);
        }
        return 0;
    }
    return CallNextHookEx(thehook, nCode, wParam, lParam);
}
BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD fwdReason, LPVOID lpvReserved) {
    switch(fwdReason)
    {
        case DLL_PROCESS_ATTACH: {
            DisableThreadLibraryCalls(hInstance);
            myInstance = hInstance;

            } break;
        case DLL_THREAD_ATTACH:
            break;
        case DLL_PROCESS_DETACH:

            break;
        case DLL_THREAD_DETACH:
            break;
    }
    return(TRUE);               // The initialization was successful, a FALSE will abort
                                // the DLL attach
}

extern "C" void __declspec(dllexport) Hook() {
    if (!thehook)
        thehook = SetWindowsHookEx(WH_CALLWNDPROC, &HookHandler, myInstance, 0);
}
extern "C" void __declspec(dllexport) UnHook() {
    if (thehook)
        UnhookWindowsHookEx(thehook);
    thehook = 0;
}

这完全可以通过全局钩子实现, here 这是一个关于如何做到这一点的很好的代码项目示例。