PSM_UNCHANGEDPSM_UNCHANGED*
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PSM_UNCHANGED


PSM_UNCHANGED 
    wParam = (WPARAM) (HWND) hwndPage; 
    lParam = 0;

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 explicitly or by using the PropSheet_UnChanged macro.

hwndPage
Handle to the page that has reverted to the previously saved state.

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