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VC++ Can't manipulate forms

VC++ Can't manipulate forms

VC++ Can't manipulate forms

I'm running Visual Studio Express 2008 and I'm currently using a Windows Form Application.
I really just want to know how to update my form (.h file) from outside the form (if that makes sense). E.g. Update the text in a text box from a management class outside of the form. Or maybe you can suggest a better design here?
I thought this might be the answer, but I'm not familiar with properties:

RE: VC++ Can't manipulate forms

I think the main problem is this auto-generated statement in main().

Application::Run(gcnew form1()));

Because it sets up the message loop, I can't seem to interact with the form.  

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