How to reset the executable for DLL testing

I'm working on my first ActiveX DLL in Visual Basic.  Not knowing any better, I kept compiling it, open a test VB project that called the DLL, and ran my tests on the DLL that way.  I was peppering the DLL code with msgbox and log print statements to debug portions of it because I couldn't fathom how to test it otherwise.

  I then noticed the RUN arrow sitting up there while editting the DLL code.  I clicked it and it prompted me to ask which executable I wanted to use the test the DLL.  I thought this was GREAT!

  But after filling in all the prompts and running it, it bombed because I forgot to add some run-line parameters with the executable name....

QUESTION: How do I bring up that dialog box to change the executable to test the DLL?    I swear I clicked on everything I could find.

Thanks
EasyAimAsked:
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Arthur_WoodConnect With a Mentor Commented:
build a project group that includes the DLL project AND a standard project that will test the DLL.  in the Project Eplorer, right click on the Standard Project and select Set As StartUP.

Make sure that in the Standard project member of the group, you have included the Reference to the DLL project.  Now you should be able to run the Standard projecvt, and step, as necessary, into the code of the DLL  project.  

That is one of the greeat strnegth of VB, and the main use of Project Groups.
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Dave_GreeneCommented:
An even easier way to test you DLL is to open it in one instance of VB. Once opened press the play button.  Nothing will happen in the DLL project (This is good!) then in another instance of VB open whichever EXE you want to call the DLL with.  Now when you run the exe and create the DLL object, the other instance of VB will get focus and you can debug the DLL.  

Although it is much easier to add the DLL project to an EXE project (Creating a Group) and test the DLL that way.  

Good luck

-Dave
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Richie_SimonettiIT OperationsCommented:
If i understood, cight click on test project and choose "Set as initial"(i don't know the exact menu item since i have vb in spanish.)
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Arthur_WoodCommented:
It should be the choice at the top of the Pop-Up Menu that is displayed when you right click on the Project Name of the Standard Project.
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EasyAimAuthor Commented:
Arthur Wood's explanation works well.  It is going to save me tons of time now.  I appreciate everyone's response.
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