For each tag <CONTROL> the parser fires this event
to get dimension of the control dynamically.
HRESULT OnControlGetSize(long ID, BSTR Name, short * W, short * H, BSTR Param);
Parameters
ID [in] - Attribute ID of the tag
Name [in] - Attrubute NAME of the tag
W [in, out] - Attribute WIDTH of the tag
H [in, out] - Attribute HEIGHT of the tag
Param [in] - Attrubute PARAM of the tag
Remarks
When attributes WIDTH or HEIGHT are skipped in the QHTML tag the client application must handle this event to
set W and H equal to dimension of the windows control this tag represents.