We've discovered (by accident) that if we hide the tree on the navigator menu, the NodeCheck works on the other forms. It's a memory issue!

The framework for this application is very intensive. I'm now going to attempt sub-classing the control to see if that reduces the memory requirements. I will also try DoEvents() as you suggest - I did read about this last week but didn't try it.
>
>In that case, have you tried loading the lastest DLLs and stuff? Can you find different versions of:
>
>OLEAUT32.DLL
>OLEPRO32.DLL
>STDOLE2.TLB
>MFC42.DLL
>
>on the computers that work and don't? Just guessing here, basically any file that has OLE in it may need to be check then.
>
>This is from an ActiveX FAQ for one of Mabry's products:
>***
>Frequently Asked Questions - FoxPro
>
>
>Why don't events fire in FoxPro 5.0?
> There can be a problem with with VFP responding to events. Be sure to set AutoYield as follows:
>
>_VFP.AutoYield = .F.
>thisForm.FTP1.Action = n
>DOEVENTS()
>***
>
>The middle line obviously doesn't apply, have you tried a DOEVENTS()?