Need Help with SendInput for key commands

[Luke Dyer]

Hey everyone I can successfully use SendInput to send mouse clicks, but I am having trouble getting it to work with sending keys. Please can someone tell me where I have gone wrong :)

    public struct KEYDBINPUT
    {
        public Int16 wVk;
        public Int16 wScan;
        public Int32 dwFlags;
        public Int32 time;
        public Int32 dwExtraInfo;
        public Int32 \_\_filler1;
        public Int32 \_\_filler2;
    }

    public struct INPUT
    {
        public Int32 type;
        public KEYDBINPUT ki;
    }

    \[DllImport("user32")\]
    public static extern int SendInput(int cInputs, ref INPUT pInputs, int cbSize);

    public const int INPUT\_KEYBOARD = 1;
    public const int KEYEVENTF\_KEYUP = 0x0002;

    public void sendKey(short key)
    {
        INPUT inputDown = new INPUT();
        inputDown.type = INPUT\_KEYBOARD;
        inputDown.ki.dwFlags = 0;

        INPUT inputUp = new INPUT();
        inputUp.type = INPUT\_KEYBOARD;
        inputUp.ki.dwFlags = KEYEVENTF\_KEYUP;

        inputDown.ki.wVk = key;
        SendInput(1, ref inputDown, Marshal.SizeOf(inputDown));

        inputUp.ki.wVk = key;
        SendInput(1, ref inputUp, Marshal.SizeOf(inputUp));
    }

Thanks a lot Luke

[Dominik Reichl]

* Use the LayoutKind.Sequential structure attribute. * You should fill the dwExtraInfo member (set it to the value returned by GetMessageExtraInfo). * The scan code should be set to the value returned by MapVirtualKey applied to the virtual key code. * Depending on whether it's an extended key, you should also specify the KEYEVENTF_EXTENDEDKEY flag. * You should use IntPtr for pointers. Using Int32 will break compatibility of your application with 64-bit operating systems. I recommend to use the definitions on P/Invoke.net: SendInput[^] Best regards Dominik

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