You'll need to use the SelStart, SelLen, and SelFont properties to
adjust these. You can use this example which changes the color as
a start:

http://support.microsoft.com/support/kb/articles/Q154/8/84.asp



>Hi! I would like to know how to format font for the richtextbox control that has its multiline property enabled.
>
>For example, I have:
>
>RichTextBox1.Text = "Sample File Output" + vbCrLf
>RichTextBox1.Text = "Date: " + vbCrLf
>RichTextBox1.Text = "Time: " + vbCrLf
>
>The first line of the Code above should be in bold character format while the remainder text should be in Normal Font format. Pls. note also that I'm using "Courier New" as my font.
>
>Thanks!
>
>Ramon