C＃中：如何捕获全球鼠标/ HID事件 [英] C#: How to capture global mouse/HID events

问题描述

我希望写一个小工具，当用户按下Windows按钮和滚动鼠标滚轮向上或向下，将捕获的全球盛会。当捕捉到这样的事件，我愿表示重定向输出到Win- +或Win--（正/负）的虚拟按键组合。可以这样做？

I wish to write a small tool that will capture a global event when the user presses the Windows button and scrolls the mousewheel up or down. When such an event is captured, I wish to redirect said output to a virtual keystroke combination of Win-+ or Win-- (plus/minus). Can this be done?

如果Windows键被保留，CTRL-ALT或这样会怎么做。

If the windows key is reserved, ctrl-alt or such would do.

推荐答案

由于它使用Windows键，钥匙可以在全球范围内使用热键绑定抓获。 RegisterHotKey在 MSDN 。

Since it uses the windows key, the key can be captured globally using a hotkey binding. RegisterHotKey at msdn.

编辑：看来，鼠标滚轮事件不被视为关键，我认为并没有什么办法让他们的一个全局热键

It seems the mousewheel events are not treated as keys as I assumed and there is no way to make a global hotkey for them.

您都会有。做一个全局窗口消息钩子和陷阱WM_MOUSEWHEEL消息。但是，你可能不得不这样做，在C / C ++。 ，AC DLL来实现，这是下面，你可以叫钩脱开从C＃启用和禁用此功能。

You will have to make a global window message hook and trap the WM_MOUSEWHEEL message. But you may have to do that in C/C++. A C dll to accomplish this is below, you can call Hook and Unhook from C# to enable and disable the function.

警告：我没有测试过此代码，并提供为。示范只

WARNING: I have not tested this code and is provided as a demonstration only.

#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;
}

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