System.Windows.Forms.TextBoxMouseView.OnPaintBackground C# (CSharp) Method

		protected virtual void OnPaintBackground(PaintEventArgs e)
		{
			if(BackColor == null)
				BackColor = Color.Transparent;
			if(BackColor == Color.Transparent)
				return;
			Pen pen = new Pen(BackColor);
			e.Graphics.DrawRectangle(pen,e.ClipRectangle);
		}