A not-well-known feature of the common controls property sheet is that you can append your own custom data to the end of the PROPSHEETPAGE structure, and the system will carry it around for you. The traditional way of setting up a PROPSHEETPAGE is to use the lParam member to point to a structure containing additional data that is used by the property sheet: struct WidgetNameData { HWIDGET widget; The post Appending additional payload to a <CODE>PROPSHEETPAGE</CODE> structure appeared first o...