WM_SYSCOMMAND SC_MOVE eats up mouse events and mouse up is not fired

My program is a chromeless window and I want to move the window when
user drag any part of my dialog. Once WM_SYSCOMMAND is used, all
subsequent mouse events are lost.

First I wrote a program to capture the mouse events and all working fine
with WTL.

BEGIN_MSG_MAP(CMainDlg)     MSG_WM_LBUTTONUP(OnMouseUp)    
MSG_WM_LBUTTONDOWN(OnMouseDown) .... LRESULT OnMouseDown ( UINT uKeys,
CPoint pt ) {     print ("on mouse down");     return 0; } LRESULT
OnMouseUp ( UINT uKeys, CPoint pt ) {     print ("on mouse up");    
return 0; }
Then I change onMouseDown above to,

LRESULT OnMouseDown ( UINT uKeys, CPoint pt ) {     print ("on mouse
down");     this->SendMessageW(WM_SYSCOMMAND, SC_MOVE|0x0002);    
return 0; }
The drag is working and the windows move along with the mouse. However,
OnMouseUp event is no longer fired.

Tried many different approach using WM_NCHITTEST, or ProcessMessage
setHandled to true/false without success.

Much appreciate if anyone has any suggestions  [Smile | :)] 


[Non-text portions of this message have been removed]



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