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_CBlistDropFile
Define a callback on drop file event. Listbox should have been created with LB_DRAGDROP flag.

ObjList _CBlistDropFile (
ObjList _list_
fun [ObjList u0 I I [P r1]] u1 _callback_
u0 _user_
)
Parameters

_list_
any listbox
_callback_
callback on drop file event (supplemental parameters are x,y coordinates and list of files)
_user_
user parameter
Return value

same listbox