如果使用 KEYEVENTF_EXTENDEDKEY，则 KEYEVENTF_KEYUP 不起作用

Question

我尝试模拟 CTRL+NumENTER。我用键盘测试程序（PassMark KeyboardTest）检查了代码，似乎按下了 NumENTER 但没有释放。如果我不使用 KEYEVENTF_EXTENDEDKEY 一切都会被释放，但我会得到正常的返回。

这是我的代码：

INPUT *ip = new INPUT[2];                   // set up input 1

(ip)->type = INPUT_KEYBOARD;                // set up keyboard event
(ip)->ki.wScan = 0;
(ip)->ki.time = 0;
(ip)->ki.dwExtraInfo = 0;

(ip)->ki.wVk = VK_CONTROL;                  // set ip[0] to CTRL
(ip)->ki.dwFlags = 0;

Sleep(100);

(ip+1)->type = INPUT_KEYBOARD;              // set up keyboard event
(ip+1)->ki.wScan = 0;
(ip+1)->ki.time = 0;
(ip+1)->ki.dwExtraInfo = 0;

(ip+1)->ki.wVk = VK_RETURN;                 // set ip[1] to ENTER
(ip+1)->ki.dwFlags = KEYEVENTF_EXTENDEDKEY; // make ENTER to NumENTER

Sleep(100);

SendInput(2, ip, sizeof(INPUT));            // send key

Sleep(100);

(ip)->ki.dwFlags = KEYEVENTF_KEYUP;         // event for keyrelease     
(ip+1)->ki.dwFlags = KEYEVENTF_KEYUP;       // event for keyrelease

Sleep(100);

SendInput(2, ip, sizeof(INPUT));            // release keys

return 0;

Answer 1

使用位或来设置dwFlags。 KEYEVENTF_EXTENDEDKEY 将前缀 (0xE0 (224)) 添加到 scanCode。

(ip)->ki.dwFlags |= KEYEVENTF_KEYUP;         // event for keyrelease     
(ip+1)->ki.dwFlags |= KEYEVENTF_KEYUP;       // event for keyrelease