WinFormsFAQ & RTF-Control

[Malfunction]

Maybe its just me ... but ...
Id like to see this added to the RichTextBox section of the WinForms FAQ:

1. How to paint something on the RTB when the paint-event is never called.
(Code example below)
2. Why are some operations (e.g. AppendText) awfully slow.
(Read this for an explanation: Nice Link )

I found many people asking these questions but only few answers.


The Code Im using to draw a border around an inherited RichTextBox:

using System.Runtime.InteropServices;

[DllImport("user32")]
		private static extern IntPtr GetDC(
			IntPtr hWnd);

		[DllImport("user32")]
		private static extern int ReleaseDC(
			IntPtr hWnd, 
			IntPtr hdc);
protected override void WndProc(ref Message m)
		{
			if (m.Msg == 0x85 || m.Msg == 0xF)
			{
				base.WndProc (ref m);
				this.paintBorder();
			}
			else
			{
				base.WndProc (ref m);
			}
		}
		private void paintBorder()
		{
			Rectangle rcItem;
			IntPtr hDC = IntPtr.Zero;

			rcItem = new Rectangle(this.Left - 1, this.Top - 1, this.Width + 1, this.Height + 1);

			hDC = GetDC(this.Parent.Handle);
			Graphics gfx = Graphics.FromHdc(hDC);

			Pen pen = new Pen(Color.Black,1);
			gfx.DrawRectangle(pen, rcItem);

			pen.Dispose();
			gfx.Dispose();
			ReleaseDC(this.Handle, hDC);
		}