TVN_SELCHANGING

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

Software for developers

Delphi Components
.Net Components
Software for Android Developers

More information resources

MegaDetailed.Net
Unix Manual Pages
Delphi Examples