How to combine 3 different project in 1 group

how to handle 3 projects in one group

I have Crated 3 projects.

One is Project 1
Another one is Project 2 and project 3

Each project i have 4-5 forms.
My default startup project is porject 1

how can i call the projet 2 and poject 3 forms in projects 1 ?

Guide in this.
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You can only do that if your project 2 and project 3 are ActiveX Dll projects
In this case you have to add references to those projects in your startup project.  

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