I'm thinking via some API calls, or maybe .NET has it, you can link in actual executables inside an MDI form. The reason I'm wanting to do this is the MDI is a suite of applications for the people in an office. I want to be able to develop applications totally seperate from the MDI form, yet I want them to be able to launch the application from within the MDI form. It would have to be a true child of the form, not just a shell out. Can anyone point me in the right direction on this? I'm an experience programmer, but not so much with the Win32 API. Thanks.