In the absence of a real option, the arrows can at least be hidden (only tested in Windows XP):

For a proportional-sized knob, SetSliderRange looks promising but I haven't explored it.
Strict Local window:TGadget = CreateWindow( "Arrowless Slider", 10,10, 200,120,, WINDOW_TITLEBAR ) Local slideX = 50, slideY = 40, slideW = 100, slideH = 16 Local coverL:TGadget = CreatePanel( slideX,slideY, slideH,slideH, window ) Local coverR:TGadget = CreatePanel( slideX + slideW - slideH - 1,slideY, slideH + 1,slideH, window ) Local slider:TGadget = CreateSlider( slideX,slideY, slideW,slideH, window, SLIDER_HORIZONTAL ) Repeat WaitEvent Until EventID() = EVENT_WINDOWCLOSE

For a proportional-sized knob, SetSliderRange looks promising but I haven't explored it.