C ++键盘挂钩CTRL键被卡住

本文介绍了C ++键盘挂钩CTRL键被卡住的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在将Windows 10机器上的 ctrl + c 和 ctrl + v 重写为添加一些其他功能.

I'm looking to rewrite ctrl+c and ctrl+v on my Windows 10 machine to add some additional functionality.

我能够正确地复制和粘贴，并在按下这些键后成功创建了一个键盘挂钩来执行我的代码，但是当我的程序在按下 ctrl 后出现问题在运行时， ctrl 会像被按住一样连续运行.即使我完全终止了程序，在我完全注销计算机之前， ctrl 仍会像被按住一样继续工作.我该怎么做才能纠正这个问题?

I'm able to copy and paste correctly and have successfully created a keyboard hook to execute my code after these keys are pressed but I'm having an issue after I press ctrl while my program is running, ctrl continuously acts as if it's held down. Even after I terminate the program entirely, ctrl continues to act as if it's being held down until I logout of the computer entirely. What can I do to correct this?

谢谢！

经过一番混乱之后，我可以得出结论，任何键都卡住了. Shift和Caps锁定也会卡住.

after doing a bit of messing around, I can conclude any key gets stuck. Shift and caps lock get stuck as well.

#include <Windows.h> #include <stdio.h> #include <queue> using namespace std; LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) { PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT)lParam; if (wParam == WM_KEYDOWN) { if (p->vkCode == 0x43 && GetKeyState(VK_CONTROL) & 0x8000) { // ctrl-c is pressed WM_COPY; } else if (p->vkCode == 0x56 && GetKeyState(VK_CONTROL) & 0x8000) { // ctrl-v is pressed OpenClipboard(NULL); char* buffer; buffer = (char*)GetClipboardData(CF_TEXT); CloseClipboard(); cout << buffer; } return CallNextHookEx(NULL, nCode, wParam, lParam); } } int main() { HHOOK keyBoard = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardProc, NULL, NULL); MSG msg; while (!GetMessage(&msg, NULL, NULL, NULL)) { TranslateMessage(&msg); DispatchMessage(&msg); } UnhookWindowsHookEx(keyBoard); }

推荐答案

请勿将return CallNextHookEx(NULL, nCode, wParam, lParam)放在if (wParam == WM_KEYDOWN)中.

修改:

LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) { PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT)lParam; if (wParam == WM_KEYDOWN) { if (p->vkCode == 0x43 && GetKeyState(VK_CONTROL) & 0x8000) { // ctrl-c is pressed WM_COPY; } else if (p->vkCode == 0x56 && GetKeyState(VK_CONTROL) & 0x8000) { // ctrl-v is pressed OpenClipboard(NULL); char* buffer; buffer = (char*)GetClipboardData(CF_TEXT); CloseClipboard(); cout << buffer; } } return CallNextHookEx(NULL, nCode, wParam, lParam); }