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_CBwinDestroy
Define a callback on destroy event : when the window is destroyed by the user, or when the father window is destroyed.

ObjWin _CBwinDestroy (
ObjWin _win_
fun [ObjWin u0] u1 _callback_
u0 _user_
)
Parameters

_win_
any window
_callback_
callback on close event
_user_
user parameter
Return value

same window