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_CBtreeUnclick
Define a callback function on unclick event.

ObjTree _CBtreeUnclick (
ObjTree _tree_
fun [ObjTree u0 I I I] u1 _callback_
u0 _user_
)
Parameters

_tree_
any tree object
_callback_
callback function on unclick event (supplemental parameters are selected item, (x,y) coordinates and button number)
_user_
user parameter
Return value

same tree object