OCX + WM_SIZE magic

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Often when I put an OCX control inside a dialog, the border of the control is not painted correctly. I've seen this quite often, so I thought it's time to find the root cause!

The solution has always been to explicitly send a WM_SIZE message (no other trick seems to work):

CRect rect;
m_htmlCtrl.GetClientRect(rect);
m_htmlCtrl.SendMessage(WM_SIZE, SIZE_RESTORED, MAKELPARAM(rect.Width(), rect.Height()));

I tried to find the underlying problem and found out that the desired rectangle was always decreased by 4 pixels (width and height). Strange.

Any ideas? I really dislike the hack above :(

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znakeeye Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 26 July 2006 Status: Offline Points: 1672	Post Options Post Reply Quote znakeeye Report Post Thanks(0) Quote Reply Topic: OCX + WM_SIZE magic Posted: 17 January 2010 at 8:08pm
	Often when I put an OCX control inside a dialog, the border of the control is not painted correctly. I've seen this quite often, so I thought it's time to find the root cause! The solution has always been to explicitly send a WM_SIZE message (no other trick seems to work): CRect rect; m_htmlCtrl.GetClientRect(rect); m_htmlCtrl.SendMessage(WM_SIZE, SIZE_RESTORED, MAKELPARAM(rect.Width(), rect.Height())); I tried to find the underlying problem and found out that the desired rectangle was always decreased by 4 pixels (width and height). Strange. Any ideas? I really dislike the hack above :(
	PokerMemento - http://www.pokermemento.com/

rdhd Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 August 2007 Location: United States Status: Offline Points: 886	Post Options Post Reply Quote rdhd Report Post Thanks(0) Quote Reply Posted: 21 January 2010 at 9:11am
	Do you add the control via the resource editor (drag and drop) or are you doing it via code? If not using the editor, try that in a sample app and then see if there are any messages such as your size message sent to the control.