CODEWITHSUNDEEP
c++mfcaccess-violation
Cheiron
Cheiron

Reputation: 3736

Acces Violation when trying to use MFC object

I am working on a MFC project with Kinect that uses a FPS counter. This is a static text. I want this FPS counter to be editted by a method which is also responsible for make the kinect images. So in my main I pass the HWND on to my kinect object like this:

kinect->initialize(this->GetSafeHwnd());

In my kinect object this thing gets saved:

this->hwnd = hWnd;

and then this piece of code to initialize the Static Text I want to use:

CStatic * MFC_ecFPSCOLOR;
MFC_ecFPSCOLOR = (CStatic *) GetDlgItem(hWnd, TC_FPSCOLOR);

And then I want to use it:

MFC_ecFPSCOLOR->SetWindowTextW(L"TEST");

And here it goes wrong:

Unhandled exception at 0x54431C19 (mfc110ud.dll) in KinectMain.exe: 0xC0000005: Access violation reading location 0x0031004C.

Can someone point me in the right direction?

Upvotes: 0

Views: 876

Answers (1)

Mark Ransom
Mark Ransom

Reputation: 308402

You're using the wrong version of GetDlgItem, it returns a handle and not a CWnd*. The cast is hiding the error from you.

Upvotes: 3

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