U3D如何调用Win10的触摸键盘Touch KeyBoard非屏幕键盘（OSK.exe）

最近一个项目要用到Windows的触摸键盘的功能，试过OSK屏幕键盘总感觉不怎么好用，试了下Win10自带的TabTip触摸键盘发现比较符合要求这里贴上U3D呼出和隐藏触摸键盘Touch KeyBoard也就是TabTip.exe的方法,win8理论上也可以用

[DllImport("user32")]
static extern IntPtr FindWindow(String sClassName, String sAppName);
[DllImport("user32")]
static extern bool PostMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);
/// 

/// 显示屏幕键盘
/// 
public void ShowTouchKeyboard()
{
	try
	{
		ExternalCall("C:\\Program Files\\Common Files\\Microsoft Shared\\ink\\tabtip.exe", null, false);
	}
	catch (Exception e)
	{
		UnityEngine.Debug.Log(e);
	}
}
/// 

/// 隐藏屏幕键盘
/// 
public void HideTouchKeyboard()
{
	try
	{
		uint WM_SYSCOMMAND = 274;
		int SC_CLOSE = 61536;
		IntPtr ptr = FindWindow("IPTip_Main_Window", null);
		PostMessage(ptr, WM_SYSCOMMAND, SC_CLOSE, 0);
	}
	catch (Exception e)
	{
		UnityEngine.Debug.Log(e);
	}
}
private static Process ExternalCall(string filename, string arguments, bool hideWindow)
{
	ProcessStartInfo startInfo = new ProcessStartInfo();
	startInfo.FileName = filename;
	startInfo.Arguments = arguments;
	// if just command, we don't want to see the console displayed
	if (hideWindow)
	{
		startInfo.RedirectStandardOutput = true;
		startInfo.RedirectStandardError = true;
		startInfo.UseShellExecute = false;
		startInfo.CreateNoWindow = true;
	}
	Process process = new Process();
	process.StartInfo = startInfo;
	process.Start();
	return process;
}