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slider   statement / function

Statement syntax
slider tag, enabled, value, rect, min, max, tickmarks, wndTag

Function syntax
value = slider(tag)

The slider statement puts a new slider in the current output window, or alters an existing slider's characteristics. The slider function returns the slider's current value as a double and is equivalent to calling fn ControlDoubleValue.

tag A number (1 through 1000000) that you assign when you create the slider and that you refer to when altering the slider. The number you assign must be different from the tag value of all other existing widgets in the current window. A negative tag hides the slider.
enabled A boolean value which specifies whether the slider should be enabled or disabled.
value The value that indicates the current extent of the slider.
rect The slider's enclosing rectangle. This can be specified in either of two ways:
(i) (x,y,w,h) where x,y are the origin and w,h the size of the slider.
(ii) A CGRect value
min The minimum value of the slider (default = 0).
max The maximum value of the slider (default = 100).
tickmarks The number of tickmarks to be displayed (default = 0).
wndTag An optional parameter for when the slider's window is not the current output window. Note specifying this parameter does not bring the window to the front or make it the output window.
Dialog event

Apple documentation