The PSN_RESET notification message notifies a page that the user has chosen the Cancel button and the property sheet is about to be destroyed. All changes made since the user last chose the Apply Now button are canceled. This notification message is sent in the form of a WM_NOTIFY message.
PSN_RESET lpnmhdr = (NMHDR FAR *) lParam;
No return value.
An application can use this notification message as an opportunity to perform cleanup operations.
A page should not call the EndDialog function when processing this notification message.
The PSHNOTIFY structure is supplied with the PSN_RESET notification message. The lParam member in this structure is TRUE if the user clicked the Ok or Cancel button, and is FALSE if the user clicked the Close button.