Can't remove control or reference; in use

[Newbi1]

I am trying to do an upgrade, but before I can do it, I have to remove all instances of the prior control. I have walked through this project step by step, but yet when I try to remove the reference, I keep getting the same message:

Can't remove control or reference; in use

How do I find the control in use? (BTW it is a crystal viewer)

 

[johnwm]

Have a browse through the .VBP and .FRM files using Notepad

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