How to deliberately invoke a windows form

I am maintaining some code. Some of the code was written, but never implemented.

 Specifically, In the project their is a windows form named frmDiag.vb. I don't know if this form was ever used (wired up) to the application. How can I tell if the frmDiag.vb code is ever actually used in the application?

Or I suppose another way of phrasing this question is : In my project I have a windows form named frmDiag.vb. So my question is : In what ways can I invoke this form? Meaning making it display on the screen?
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brgdotnetcontractorAsked:
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Fernando SotoRetiredCommented:
Hi  brgdotnet;

On the main menu click on the Edit --> Find and Replace --> Find in Files. In the new window that opens enter frmDiag in the "Find what:" comboBox. Then select Entire Solution in the "Look in:" comboBox. Then click "Find All" button. This will find all instances of that word in the solution in the Find Result window that will open. Double clicking on  any of the found results will open the file to the location it appears.

To your question "In what ways can I invoke this form?", Place a button on a form that does display a form and in its click event instantiate the form:

Dim diagFrm = New frmDiag()
diagFrm.Show()

Open in new window

That will display it.

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Éric MoreauSenior .Net ConsultantCommented:
You could comment out the whole form. If it is referenced, your project won't just compile. That's easy and it would answer your question maybe 95% of the time.

The remaining 5% is if the form is used by Reflection. Then the compilation wouldn't failed. Only the runtime.
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