fDraggingSplitterIndex
fDraggingSplitterIndex = index;
if (fDraggingSplitterIndex < 0)
return _SetSplitterValue(fDraggingSplitterIndex,
if (fDraggingSplitterIndex < 0)
fDraggingSplitterIndex = -1;
return fDraggingSplitterIndex;
int32 fDraggingSplitterIndex;