Member variable XbpSpinButton():fastSpin Foundation
Determines whether fast increment and decrement is turned on.
The instance variable :fastSpin contains the value .F. (false) by default. In this mode, changes to the value are somewhat slower when the mouse button is clicked on one of the arrows and the button remains pressed. If this instance variable is set to .T. (true), the spinbutton is in the "fast" operation mode. The value is incremented or decremented at twice the normal speed. If the spinbutton is defined as the master for another spinbutton, :fastSpin is ignored (see the instance variable :master).
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