PSN_KILLACTIVE

The PSN_KILLACTIVE notification message notifies a page that it is about to lose the activation either because another page is being activated or the user has chosen the OK button. This notification message is sent in the form of a WM_NOTIFY message.

PSN_KILLACTIVE

lpnmhdr = (NMHDR FAR *) lParam;

Parameters

lpnmhdr

Pointer to an NMHDR structure. The hwndFrom member is the handle to the property sheet.

Return Values

Returns TRUE to prevent the page from losing the activation or FALSE to allow it.

Remarks

An application should validate the information that the user has typed.

To set the return value, the dialog box procedure for the page must use the SetWindowLong function with the DWL_MSGRESULT value, and the dialog box procedure must return TRUE.

If the dialog box procedure sets DWL_MSGRESULT to TRUE, it should display a message box to explain the problem to the user.

See Also

SetWindowLong, NMHDR, WM_NOTIFY

Software for developers

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More information resources

MegaDetailed.Net
Unix Manual Pages
Delphi Examples