模拟向上箭头keybd_event（不起作用？）

Question

keybd_event(VK_UP, MapVirtualKey(VK_UP, 0), 0, 0); //pressed
Sleep(100);
keybd_event(VK_UP, MapVirtualKey(VK_UP, 0), KEYEVENTF_KEYUP, 0); //released
Sleep(300);

The following is not automatically pressing the UP arrow and releasing it like it should. Am I doing something wrong?

Answer 1

The keybd_event function is obsolete. It has been superseded by the SendInput function .

The following code might do what you want.

UINT SendUpArrow()
{
    INPUT input[2] = {0};
    input[0].type = INPUT_KEYBOARD;
    input[0].ki.wVk = VK_UP;
    input[0].ki.dwFlags = 0;
    input[1].type = INPUT_KEYBOARD;
    input[1].ki.wVk = VK_UP;
    input[1].ki.dwFlags = KEYEVENTF_KEYUP;
    UINT ret = ::SendInput(_countof(input), input, sizeof(INPUT));
    return ret;
}