private void SetUnVisible()
 {
     if (this.InvokeRequired)
     {
         SettheUnvis d = new SettheUnvis(SetUnVisible);
         this.Invoke(d);
     }
     else
     {
         this.Visible = false;
     }
 }
 private void SetUnVisible()
 {
     if (this.InvokeRequired)
     {
         SettheUnvis d = new SettheUnvis(SetUnVisible);
         this.Invoke(d);
     }
     else
     {
         this.Visible = false;
     }
 }