Establishes a property page as a wizard.
A key characteristic of a wizard property page is that the user navigates using Next or Finish, Back, and Cancel buttons instead of tabs.
Call SetWizardMode before calling DoModal. After you call SetWizardMode, DoModal will return either ID_WIZFINISH (if the user closes with the Finish button) or IDCANCEL.
SetWizardMode sets the PSH_WIZARD flag.