:) I use C# EE. I do it the following: having a Solution called "Application" I inserted two projects. 1. WindowsForm (Executable) 1. Class1 Class (as DLL) The Assemblies must be referenced to the DLL you use. My WindowsForm Application gets the Ref to Class1.DLL. Then my Application has to include: **using** Class1; The same works if I would handle another DLL instead of my executable WindowsForm. If you use more DLLs make sure they are "cross"-referenced, but don't overdrive... ;)

Andyancona andysm00@aim.com andy@biomedsrl.com