Christian,

We have a single class library (project) where we put all our "base classes" . We have one class that contains all the programmatically defined sub-classes, like I showed in my last post. We also have several user control classes in this same class library. You can put anything in a class library, it doesn't matter if it's a user control or just a single .cs file (or .vb). And yes, you can add these to the toolbox (just right-click on the ToolBox and choose Customize Toolbox).

Remember, anything in a project (class library) is compiled into a single .DLL (except for the "startup project", shown in BOLD in the Solution Explorer, which becomes the .EXE).

HTH,
~~Bonnie



>Ok, that get me started. Two last questions:
>
>1- Is it possible to make class libraries (including several control subclass like you did) in a single class and then add tjhis class to the toolbox (again like we did in VFP)?
>
>2- Are you starting form a class project or a user control project? I think that the class project is the answer but just to be sure. The user control project would allow me to design the control visually but not to include it in a calss library.
>
>Thank you for your help,
>Chrstian