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_CBcompCheckStateChanged
Sets a callback corresponding to a change occuring in button state.

CompCheck _CBcompCheckStateChanged (
CompCheck _check_
fun [CompCheck u0 I] u1 _callback_
u0 _user_
)
Parameters

_check_
any CompCheck
_callback_
callback function on object state change (supplemental parameter is new button state)
state is one of the values :
Value Meaning
CHK_CHECKED button is checked
CHK_UNCHECKED button is unchecked
_user_
user parameter
Return value

same CompCheck