A language INI file makes it possible to use syntax coloring based on character combinations in the text file. For example,

[Tag1]
ColorGroup =Comment
BeginTag =//
EndTag =
MultiLine =0
EscapeChar=

This code will instruct the edit control to mark items following the "//" to be colored as commented text (green by default). To set this for VB, you would simply use BeginTag=’ instead of BeginTag=//

C# and VB INI files are included with Essential Edit, and can be used as a basis for your customization.