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The TVN_SELCHANGING notification message notifies a tree-view control’s parent
window that the selection is about to change from one item to another. This
notification message is sent in the form of a WM_NOTIFY
message.
TVN_SELCHANGING
pnmtv = (NM_TREEVIEW FAR *) lParam
Parameters
-
pnmtv
-
Pointer to an NM_TREEVIEW structure.
The itemOld and itemNew members contain valid information about
the currently selected item and the newly selected item. The action
member 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_SELCHANGED notification message.
Return Values
Returns TRUE to prevent the selection from changing.
See Also
NM_TREEVIEW, TVN_SELCHANGED,
WM_NOTIFY