private static extern void keybd_event(byte bVk, byte bScan, keyFlag dwFlags, int dwExtraInfo);
private static extern void keybd_event(byte bVk, byte bScan, keyFlag dwFlags, int dwExtraInfo);
private static extern void keybd_event(byte bVk, byte bScan, keyFlag dwFlags, int dwExtraInfo);
private static extern void keybd_event(byte bVk, byte bScan, keyFlag dwFlags, int dwExtraInfo);