TVN_SELCHANGED notification code
Notifies a tree-view control's parent window that the selection has changed from one item to another. This notification code is sent in the form of a WM_NOTIFY message.
TVN_SELCHANGED
pnmtv = (LPNMTREEVIEW) lParam
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lParam
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Pointer to an NMTREEVIEW structure. The itemOld and itemNew members of the NMTREEVIEW structure are TVITEM structures that contain information about the previously selected item and the newly selected item. Only the mask, hItem, state, and lParam members of these structures are valid. The stateMask members of the TVITEM structures specified by itemOld and itemNew are undefined on input. The action member of the NMTREEVIEW structure indicates the type of action that caused the selection to change. It can be one of the following values:
Requirement Value TVC_BYKEYBOARD By a keystroke. TVC_BYMOUSE By a mouse click. TVC_UNKNOWN Unknown.
The return value is ignored.
Requirement | Value |
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Minimum supported client |
Windows Vista [desktop apps only] |
Minimum supported server |
Windows Server 2003 [desktop apps only] |
Header |
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Unicode and ANSI names |
TVN_SELCHANGEDW (Unicode) and TVN_SELCHANGEDA (ANSI) |