/// <summary>
/// 按下键盘键
/// </summary>
/// <param name="vKey">虚拟键码</param>
public static void SendKeyDown(short vKey)
{
NativeMethods.INPUT[] input = new NativeMethods.INPUT[1];
input[0].type = NativeMethods.INPUT_KEYBOARD;
input[0].ki.wVk = vKey;
input[0].ki.time = UnsafeNativeMethods.GetTickCount();
UnsafeNativeMethods.SendInput((uint)input.Length, input, Marshal.SizeOf(input[0]));
}