WINFORM隐藏光标

using System.Runtime.InteropServices;

[DllImport("USER32", EntryPoint = "HideCaret")]
private static extern bool HideCaret(IntPtr hWnd);

//获得焦点事件时隐藏光标
TB.GotFocus += new EventHandler(TB_GotFocus);

void TB_GotFocus(object sender, EventArgs e)
{
    HideCaret((sender as Control).Handle);  
}