Q270029: BUG: COleControl::SetControlSize Function Does Not Work

Article: Q270029
Product(s): Microsoft C Compiler
Version(s): 3.0,6.0
Operating System(s): 
Keyword(s): kbETK kbOSWinCEsearch kbDSupport kbGrpDSETK kbCodeSnippet
Last Modified: 11-MAY-2001

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The information in this article applies to:

- Microsoft Windows CE Toolkit for Visual C++ 6.0 
- Microsoft eMbedded Visual C++ version 3.0 
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SYMPTOMS
========

When you use the COleControl::SetControlSize function from within a Windows CE
(WCE) Microsoft Foundation Classes (MFC) ActiveX ControlWizard generated ActiveX
control, the ActiveX control does not resize properly.

RESOLUTION
==========

To solve the problem, in addition to calling the COleControl::SetControlSize
function, also call the SetWindowPos Win32 API function to resize the parent
window of the control as shown in the following code example:

  BOOL gfTest = FALSE;

  void CMYCONTROLCtrl::OnLButtonDown(UINT nFlags, CPoint point) 
  {
  	if (gfTest) {
  		gfTest = FALSE;
  		((CWnd*)this)->GetParent()->SetWindowPos(NULL, 0, 0, 100, 100, SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
  		SetControlSize(100, 100);
  	}
  	else {
  		gfTest = TRUE;
  		((CWnd*)this)->GetParent()->SetWindowPos(NULL, 0, 0, 200, 200, SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
  		SetControlSize(200, 200);
  	}

  	COleControl::OnLButtonDown(nFlags, point);
  }

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Create a new ActiveX control by using the eVC WCE MFC ActiveX Control Wizard
  and accept all the default settings.

2. Use the ClassWizard to add a handler for the WM_LBUTTONDOWN message.

3. Within the message handler add the following code, which does resize the
  control when you left-click the control:

  BOOL gfTest = FALSE;

  void CMYCONTROLCtrl::OnLButtonDown(UINT nFlags, CPoint point) 
  {
  	// TODO: Add your message handler code here and/or call default
  	if (gfTest) {
  		gfTest = FALSE;
  		SetControlSize(100, 100);
  	}
  	else {
  		gfTest = TRUE;
  		SetControlSize(200, 200);
  	}

  	COleControl::OnLButtonDown(nFlags, point);
  }

4. Compile, link and deploy the ActiveX control.

5. Host the control within an eVB or eVC application.

RESULT: The control does not resize when you left-click the control.

Additional query words: SetControlSize ActiveX wince

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Keywords          : kbETK kbOSWinCEsearch kbDSupport kbGrpDSETK kbCodeSnippet 
Technology        : kbVCsearch kbAudDeveloper kbWinCETKVCSearch kbWinCESearch kbVCeMb kbWinCETK600VC
Version           : :3.0,6.0
Issue type        : kbbug
Solution Type     : kbpending

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