Unlike Display/Dialog listbox control, that provides a 'lbSelection' function to return items selected; there is no similar function for the RscTree control when 'multiselectEnabled = 1'.
tvCurSel only returns the currently selected item, and any items; multi selected using [CTRL] Click or space, or [SHIFT] Click, cannot be identified.
If there is a secret/hidden command that is not listed on the Biki, please let me know what it/they are.
If multiselect is not currently fully implemented, please lee me know so I can stop my search for a solution.