Microsoft KB Archive/138032

= FIX: CIRC2 and CIRC3 Samples Don't Handle WM_SIZE Message =

Article ID: 138032

Article Last Modified on 11/21/2006

-

APPLIES TO


 * Microsoft Foundation Class Library 4.2, when used with:
 * Microsoft OLE Control Developer's Kit (CDK)

-



This article was previously published under Q138032



SYMPTOMS
Trying to decrease the size of the Circle control after changing the CircleOffset property may cause the circle to get drawn outside the control's rectangle. Handle the WM_SIZE message and reset the offset. This should only take place if the CircleShape property is set to TRUE and if the circle's position is outside the control's new size.

Sample Code to Implement Workaround
void CCirc2Ctrl::OnSize(UINT nType, int cx, int cy) {   COleControl::OnSize(nType, cx, cy);

// If circle shape is true and circle does not fit in new size, reset // the offset

if(m_circleShape && !InBounds(GetCircleOffset)) SetCircleOffset(0); }



CAUSE
The circle control does not respond to the WM_SIZE message and therefore does not adjust its CircleOffset property to compensate for the change in control size.



STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This problem was corrected in the version of the Microsoft Foundation Classes (MFC) that ships with Visual C++, 32- bit Edition, version 4.0.



Steps to Reproduce Problem

 * 1) Build either the Circ2 or Circ3 sample.
 * 2) On the Tools menu, click Register Control, and verify that the control registers successfully.
 * 3) On the Tools menu, click Test Container.
 * 4) On the Edit menu, click Insert OLE Control, and then click the control that was built in step 1.
 * 5) Resize the control to a rather long rectangle.
 * 6) On the View menu, click Properties, and change the CircleOffset property to 100 pixels to decentralize the circle.
 * 7) Resize the control to force the circle outside the rectangle.
 * 8) Notice that the circle is drawn outside the rectangle.

Additional query words: 1.10 1.20 1.00 1.50 1.51 1.52 2.00 2.10 2.20 2.50 2.51 2.52 3.00 3.10 3.20 size tutorial

Keywords: kbbug kbcode kbctrl kbfix kbnoupdate kbvc400fix KB138032

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.