I have created 2 Dialogs, the two of them are visible at same time.

int eh first dialog lets call it CGraphicDlg i have define a variable nAction as int and public access, however when i try to make reference to it in the second Dialog the compiler gave me an err message telling me "undeclared identifier nAction" What do I need to do in order to achive this.

I need to do this because the user will do certain action depending on some choices he makes in the CGraphicDlg.