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void BeginDrag( UINT uBand**, DWORD** dwPos = (DWORD)-1 );
Parameters
uBand
Zero-based index of the band which the drag-and-drop operation will affect.
dwPos
A DWORD value that contains the starting mouse coordinates. The horizontal coordinate is contained in the LOWORD and the vertical coordinate is contained in the HIWORD. If you pass (DWORD)-1, the rebar control will use the position of the mouse the last time the control's thread called ::GetMessage or ::PeekMessage.
Remarks
This member function implements the behavior of the Win32 message , as described in the Platform SDK.