DTN_FORMAT notification code
Sent by a date and time picker (DTP) control to request text to be displayed in a callback field. This notification code is sent in the form of a WM_NOTIFY message.
DTN_FORMAT lpNMFormat = (LPNMDATETIMEFORMAT) lParam;
A pointer to an NMDATETIMEFORMAT structure containing information regarding this instance of the notification code. The structure contains the substring that defines the callback field and receives the formatted string that the control will display.
The owner of the control must return zero.
Handling this notification code allows the owner of the control to provide a custom string that the control will display. (For additional information about callback fields, see Callback fields.)
|Minimum supported client
||Windows Vista [desktop apps only]
|Minimum supported server
||Windows Server 2003 [desktop apps only]
|Unicode and ANSI names
||DTN_FORMATW (Unicode) and DTN_FORMATA (ANSI)