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[C++ .NET] Accessing parent form variable

I'm working on an app which uses a parent form and child forms in C++.Net. I want to access a static arraylist variable of the parent form from a child form. In order to do so, I wanted to use the MDIParent property like this:

Form1 ^parentForm = (Form1 ^)this->MdiParent;

where Form1 is the parent's class. Then use parentForm to get the arraylist variable. Currently, this code is implemented in another header file from which Form1 is defined. In normal C++ I would have used extern ref class Form1 to let the compiler know the Form1 class is defined elsewhere. But now I get the following error:

warning C4669: 'type cast' : unsafe conversion: 'System::Windows::Forms::Form' is a managed type object

How can this be solved? Is there another way in C++.NET to access the variable?
Apr 4 '10 #1
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