SendInput不发送字符或数字

Question

I've got something like that:

void generateKeybdEvent(int vk, bool extended) {
    KEYBDINPUT kb = {0};
    INPUT Input = {0};

    if ( extended )
        kb.dwFlags = KEYEVENTF_EXTENDEDKEY;
    kb.wVk = vk;
    Input.type = INPUT_KEYBOARD;
    Input.ki = kb;
    SendInput(1, &Input, sizeof(Input));

    ZeroMemory(&kb, sizeof(KEYBDINPUT));
    ZeroMemory(&Input, sizeof(INPUT));
    kb.dwFlags = KEYEVENTF_KEYUP;
    if ( extended )
        kb.dwFlags |= KEYEVENTF_EXTENDEDKEY;

    kb.wVk = vk;
    Input.type = INPUT_KEYBOARD;
    Input.ki = kb;
    SendInput(1, &Input, sizeof(Input));
}

When I send inputs 'A', CapsLock, 'A':

generateKeybdEvent ('A', false);
generateKeybdEvent (VK_CAPITAL, true);
generateKeybdEvent ('A', false);

The only effect is that my num lock toggles.

Why I cant send characters or numbers to apps?

Note I'm using Windows 7 with Polish keyboard layout and Qt with MinGW.

Answer 1

VK_CAPITAL is not extended key.
Key is extended if (vk >= 33 && vk <= 46) || (vk >= 91 && vk <= 93) (vk >= 33 && vk <= 46) || (vk >= 91 && vk <= 93) .

Also ZeroMemory can be omitted here, so your function could look like this:

KEYBDINPUT kb = {0};
INPUT Input = {0};

if ( (vk >= 33 && vk <= 46) || (vk >= 91 && vk <= 93) )
    kb.dwFlags = KEYEVENTF_EXTENDEDKEY;

kb.wVk = vk;
Input.type = INPUT_KEYBOARD;
Input.ki = kb;

SendInput(1, &Input, sizeof(Input));
kb.dwFlags |= KEYEVENTF_KEYUP;
SendInput(1, &Input, sizeof(Input));

And the most important thing: Problem is probably not in this function . I guess that input is sent, but to the wrong window. Use SetFocus function to direct this input (call it before you call SendInput ).

You should also check SendInput on pinvoke.net