Get current scroll position from rich text box control?

Question

I have searched the internet far and wide and seen many questions like this, but I have not seen an actual answer.

I have a rich text box control with lots of text i

Answer 1

The following works very well in one of my solutions:

Point P = new Point(rtbDocument.Width, rtbDocument.Height);
int CharIndex = rtbDocument.GetCharIndexFromPosition(P);

if (rtbDocument.TextLength - 1 == CharIndex)
{
   btnAccept.Enabled = true;
}