The PSM_UNCHANGED message informs a property sheet that information in a page has reverted to the previously saved state. The property sheet disables the Apply Now button if no other pages have registered changes with the property sheet. You can send this message explictly or by using the PropSheet_UnChanged macro.
PSM_UNCHANGED
wParam = (WPARAM) (HWND) hwndPage;
lParam = 0;
Parameters
hwndPage
Handle to the page that has reverted to the previously saved state.
Return Values
No return value.
See Also