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Error message: data abort when create child window

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Arcnet

23 Posts

Posted - 25 Dec 2003 : 11:04:42

Hello everybody.

We have "BitsyX" with WinCE 4.2 Ver.(4.20.01)

One of our applications written on C# uses MFC dll.

In the dll we must create window as a child of main C#-form.

We get handle of C#-form with the next code:

//////////////////////////////////////////////////////////////////
[DllImport("coredll.dll")]
private static extern IntPtr SetCapture ( IntPtr hWnd );

[DllImport("coredll.dll")]
private static extern IntPtr GetCapture ();

public static IntPtr GetHWND ( Control ctrl )
{
IntPtr hOldWnd = GetCapture ();
ctrl.Capture = true;
IntPtr hWnd = GetCapture ();
ctrl.Capture = false;
SetCapture( hOldWnd );
return hWnd;
}
////////////////////////////////////////////////////////////////////

We pass this handle into dll as int*, and in dll

and declarate the parent window:

/////////////////////////////////////////////////////////////////////

CWnd* pParentWnd = NULL;
pParentWnd = new CWnd ();

pParentWnd->Attach ( (HWND)pParent ); // pParent - the passed handle

/////////////////////////////////////////////////////////////////////

We create child window OK, but from debug (COM 3) port we get the

next message:

------------------------------------------------------------------
Data Abort: Thread=82d3323c
Proc=81167d28 'OUR_Application.exe'
AKY=00000801 PC=035844ad RA=035844a9 BVA=18000028 FSR=00000007
------------------------------------------------------------------

What does it mean?

Thanks.

jbaik

22 Posts

Posted - 29 Dec 2003 : 09:33:23

You will see Data Abort when your application violates memory access such as acessing NULL Pointer, Data Alignment Error.
You may cactch this error with the following routine.

try {
SetCapture( hOldWnd );
}
catch (Exception e) {
Console.WriteLine("Exception from SetCapture : " + e.Message);
}

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