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4/8/2010

This message notifies a tree view control's parent window that the selection is about to change from one item to another. It is sent in the form of a WM_NOTIFYmessage.

Syntax 

TVN_SELCHANGING 
pnmtv = (NM_TREEVIEW FAR *) 
lParam

Parameters

pnmtv

Pointer to an NM_TREEVIEWstructure. The itemOldand itemNewmembers contain valid information about the currently selected item and the newly selected item. The actionmember indicates whether a mouse or keyboard action is causing the selection to change. For a list of possible values, see the description of the TVN_SELCHANGEDmessage.

Return Value

TRUE prevents the selection from changing.

Requirements

Header commctrl.h
Windows Embedded CE Windows CE 1.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also