Hans-Peter Diettrich schrieb: > TWin32WidgetSet.SetScrollInfo modifies the content of the ScrollInfo > ScrollInfo.nMax := Max(ScrollInfo.nMin, ScrollInfo.nMax - 1); > i.e. nMax is typically decremented by 1, with *every* new call! It looks like this is only a wrong implementation of the constraints, described in the WinAPI docs. DoDi