1.选择目标窗口 获取窗口句柄

void KeyPresser::selectWindow() {
    SetWinEventHook(EVENT_SYSTEM_FOREGROUND, EVENT_SYSTEM_FOREGROUND, NULL, WinEventProc, 0, 0, WINEVENT_OUTOFCONTEXT);
    selectedWindowLabel->setText("请点击目标窗口...");
}

void CALLBACK KeyPresser::WinEventProc(HWINEVENTHOOK hWinEventHook, DWORD event, HWND hwnd, LONG idObject, LONG idChild, DWORD dwEventThread, DWORD dwmsEventTime) {
    if (event == EVENT_SYSTEM_FOREGROUND) {
        wchar_t windowTitle[256];
        GetWindowText(hwnd, windowTitle, 256);
        if (KeyPresser::instance) {
            KeyPresser::instance->targetHwnd = hwnd;
            KeyPresser::instance->selectedWindowLabel->setText(QString::fromWCharArray(windowTitle));
            UnhookWinEvent(hWinEventHook);
        }
    }
}

2. 向目标窗口发送按键消息

void KeyPresser::pressKeys(int index) {
    if (targetHwnd) {
        int key = keyCombos[index]->currentData().toInt();

        DWORD dwVKFkeyData; // lParam 参数值
        WORD dwScanCode = MapVirtualKey(key, MAPVK_VK_TO_VSC); // 获取虚拟按键的键盘扫描码

        dwVKFkeyData = 1;
        dwVKFkeyData |= dwScanCode << 16;
        dwVKFkeyData |= 0 << 24;
        dwVKFkeyData |= 1 << 29;
        PostMessage(targetHwnd, WM_KEYDOWN, key, dwVKFkeyData);

        // 重置 dwVKFkeyData 以确保 WM_KEYUP 消息正确
        dwVKFkeyData = 1;
        dwVKFkeyData |= dwScanCode << 16;
        dwVKFkeyData |= 0 << 24;
        dwVKFkeyData |= 1 << 29;
        dwVKFkeyData |= 3 << 30;
        PostMessage(targetHwnd, WM_KEYUP, key, dwVKFkeyData);
    }
}

3. 成品展示

简介

• KeyPresser 是一款免费的自动化按键工具，它可以与窗口交互，并支持后台运行, 无需保持被控窗口在前台运行。用户可以选择要操作的目标窗口，并通过勾选复选框来控制要发送哪些按键消息。可以从组合框中选择所需的按键，并在编辑框中输入时间间隔以控制按键发送之间的延迟。程序提供“开始”和“停止”按钮来启动和终止按键发送过程。

成品下载

https://www.progdomain.com/627/