is there a way to know if CPropertyPage dialog's state has changed since
OnInitDialog and OnOK functions (ie. state betwwen showing the dialog and
closing it)? e.g. CPropertyPage has been displayed with IDC_CHECK checked,
user unchecks that IDC_CHECK and tap OK. how can I know automatically has
the state on that page been changed because I have a lot of pages and lot of
CHECK's on them. thanks for replying.