Refering to App variable from Dialog

[skwrox]

I need to refer to, and set an Application variable from my Dialog class. I tried this:

CMyAppApp * pApp = AfxGetApp();

The error says it needs reinterpret_cast, C-style cast or function-style cast. So I tried:

CMyAppApp * pApp = dynamic_cast<CMyAppApp *>(AfxGetApp());

I still get a warning saying 'dynamic_cast' used on polymorphic type 'class CWinApp' with /GR-; unpredictable behavior may result. The app. crashes at that line.

What's wrong? How else can I refer to an App. class variable? Someone please explain?

TIA
Sudhir

 

[Guest_imported]

Hi, you have 2 ways how to solve it...

CMyAppApp * pApp = AfxGetApp();
1. use different type casting
- C style: CMyAppApp* pApp = ( CMyAppApp * ) AfxGetApp();
- reinterpret_cast
- static_cast

CMyAppApp * pApp = dynamic_cast<CMyAppApp *>(AfxGetApp());
2. enable Run-Time Type Information( RTTI ) either by setting compiler option /GR or Dev. Studio you can change project settings: C/C++ : C++ Language : Enable...