c# textbox 设置不获取光标

[DllImport("user32",EntryPoint = "HideCaret")]
private static extern bool HideCaret(IntPtr hWnd);            //需引入命名空间using System.Runtime.InteropServices;

private void Txt_RecInfo_MouseDown(object sender, MouseEventArgs e)
{
    HideCaret((sender as TextBox).Handle);
}

还有一种方式就是设置其他控件 pl_1.Focus();