Accessing main form from functions in other classes

[pjmartins]

I'm trying to draw a line on a form through a function which is in a class that I created inside another .h and .cpp file. But I cannot give it access to the main form or it's controls. Is there any way that I can pass the form into the functions of the class or a way that I can access the main form or maybe just a picturebox on the form in which I can draw too. And if so, how can I declare a temporary form / picturebox inside the class which I can then assign to the form / picturebox of the main form to?

PJ

 

[timmay3141]

Just give your other form a member variable that is a pointer to the main form.

 

[pjmartins]

What would I declare that pointer as, I've tried to use System::Windows::Forms::Form and it gives me the error: cannot declare a managed "Pointer" in an unmanaged "Class".

 

[timmay3141]

I guess you'd need to make your class managed...I've never used .NET in C++ because IMO all of the advantages to C++ revolve around the fact that it is not a managed language. There is really no reason to use .NET with C++ since it actually generates faster exes with C# (I read that somewhere, don't remember where) and using C# is much easier, as it and the .NET framework were more or less designed for each other. If you can, I'd recommend using C# instead of C++ if you want to use .NET. If that would be too much work converting the code, I guess just try to make the rest of your code managed, or maybe someone else can help that has used .NET with C++. Sorry I can't really help.

 

[pjmartins]

Thanks for the advice, you are right c# is much easier but unfortunately I'm doing this project for my class in which we use Project Builder from Macintosh and c++ with .net is the only equivalent I could find since we're working with multiple .cpp and .h files