Method XbpSpinButton():spinUp() Foundation
Increments the numeric value by a specific amount.
:spinUp( <nIncrement> ) --> lSuccess
This method returns the value .T. (true) when the value in the entry field could be incremented, otherwise .F. (false) is returned.
The :spinUp() method allows the value in the entry field of the spinbutton to be incremented by a specific amount without the user clicking on one of the arrows.
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