Assertion error in VS 2005 C++

LeonardLay

I am trying to use a CFrameWnd in my code and I keep getting an assertion error when I try to ShowWindow(SW_SHOW);

CWnd \* tempWnd = new CWnd(); //Create a new CWnd object
tempWnd->Attach(p\_adsw\_hwndAcad); //handle to the main window
CFPLvlLyrWnd \*mWnd = (CFPLvlLyrWnd\*)(RUNTIME\_CLASS(CFPLvlLyrWnd))->CreateObject(); //CFPLvleLyrWnd is derived from CFrameWnd
RECT sizze = CFrameWnd::rectDefault;
DWORD dwStyle = WS\_OVERLAPPEDWINDOW;
    //set up Window size
if (mWnd->Create(NULL, "Levels/Layers", dwStyle, sizze, tempWnd, MAKEINTRESOURCE(0) ))
{
        mWnd->m\_parentWHandle = p\_adsw\_hwndAcad;
            tempWnd->BeginModalState();
	mWnd->ShowWindow(SW\_SHOW);
}
else
{
	AfxMessageBox("LoadFrame failed!");
}
HWND tempHandle = tempWnd->Detach();

delete(tempWnd);

This will run in VS 6.0 but in VS 2005 I get an assertion error and the program crashes. What could be the problem? Help me Obi-Wan Kenobi, you're my only hope!:confused:

David Crow

LeonardLay wrote:

...I get an assertion error...

What line of what file is asserting?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

LeonardLay

The assertion error is in File: f:\rtm\vctools\vc7libs\ship\atlmfc\src\mfc\winfrm.cpp Line: 942

Maximilien

what line in YOUR code.

Maximilien Lincourt Your Head A Splode - Strong Bad

LeonardLay

mWnd->ShowWindow(SW_SHOW); When it gets to this point, the assertion error appears. I stepped into the code for ShowWindow and when it calls the AfxGetThread() it returns a NULL then it gives the assertion error because the return should not be NULL.

Stephen Hewitt

Show us the code that contains the ASSERT!

Steve

LeonardLay

LRESULT CFrameWnd::OnActivateTopLevel(WPARAM wParam, LPARAM lParam)
{
CWnd::OnActivateTopLevel(wParam, lParam);

// exit Shift+F1 help mode on activation changes
ExitHelpMode();

#ifndef _AFX_NO_OLE_SUPPORT
// allow OnFrameWindowActivate to be sent to in-place items
if (m_pNotifyHook != NULL)
{
// activate when active and when not minimized
m_pNotifyHook->OnActivate(
LOWORD(wParam) != WA_INACTIVE && !HIWORD(wParam));
}
#endif

// deactivate current active view
**CWinThread \*pThread = AfxGetThread(); //This returns NULL for the thread
ASSERT(pThread); //This is where the assertion error occurs.**  
if (pThread->m\_pMainWnd == this)
{
	CView\* pActiveView = GetActiveView();
	if (pActiveView == NULL)
		pActiveView = GetActiveFrame()->GetActiveView();
	if (pActiveView != NULL)
		pActiveView->OnActivateView(FALSE, pActiveView, pActiveView);
}

wipehindy

Did you find a solution for your problem ? Thank you.

LeonardLay

Unfortunately I still haven't found a solution for this problem. I ended up just going back to using VS 6.0 to continue developing my software.