CEdit Control - Exception calling setwindowtext

From:

Carl Hartman <halfwax@gmail.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 11 Feb 2015 11:21:18 -0800 (PST)

Message-ID:

<02cdabf2-1c7a-4dd3-a289-2a0c979eae77@googlegroups.com>

I am having an issue with a CEdit control and using setwindowtext() to put =
text in the box. I have tried this in VS 2010, 2012, and 2013. I have a sim=
ple windows form program with an edit box. During the OnChange call I want =
to grab the text out of the edit box, change everything to upper case and p=
ut it back into the box. The control has been assigned to a variable:

CEdit m_edit1;

added to DoDataExchange

DDX_Control(pDX, IDC_EDIT1, m_edit1);

In the FormView cpp file example:

void CTestView::OnEnChangeEdit1()
{
     CString str;
     m_edit1.GetWindowTextW(str); // get the string
     if(!str.IsEmpty()) // string not empty
     {
          str = str.MakeUpper(); // change to upper case
          m_edit1.SetWindowTextW(str); // put it back
     }
}

The line:

m_edit1.SetWindowTextW(str); // put it back

causes this:

First-chance exception at 0x5082D7A3 (mfc120ud.dll) in Test.exe: 0xC00000FD=
: Stack overflow (parameters: 0x00000001, 0x00322FFC).
Unhandled exception at 0x5082D7A3 (mfc120ud.dll) in Test.exe: 0xC00000FD: S=
tack overflow (parameters: 0x00000001, 0x00322FFC).

It doesn't matter if is x86, x64, debug, release compiled, it always fails.=
Desktop is running Win 7 Pro x64.

Is this not the correct way to set and reset text in an edit box?

CH