Ok, I have found this from M$, but I need it converted to VB.
Code:
typedef struct tagSCROLLBARINFO {
    DWORD cbSize;
    RECT rcScrollBar;
    int dxyLineButton;
    int xyThumbTop;
    int xyThumbBottom;
    int reserved;
    DWORD rgstate[CCHILDREN_SCROLLBAR+1];
} SCROLLBARINFO, *PSCROLLBARINFO, *LPSCROLLBARINFO;
VB API
VB Code:
  1. Private Declare Function GetScrollBarInfo Lib "user32.dll" (ByVal hwnd As Long, _
  2. ByVal idObject As Long, ByRef psbi As PSCROLLBARINFO) As Long
Or maybe subclass the lvw and trap for the WM_VSCROLL message. Or test somehow for the SBS_VERT scrollbar style???