wxListCtrl

How's about :

Local rect:wxRect = ListControl.GetRectRect()

Some of wxRect's methods :

wxRect::GetBottom
wxRect::GetHeight
wxRect::GetLeft
wxRect::GetPosition
wxRect::GetTopLeft
wxRect::GetTopRight
wxRect::GetBottomLeft
wxRect::GetBottomRight
wxRect::GetRight
wxRect::GetSize
wxRect::GetTop
wxRect::GetWidth
wxRect::GetX
wxRect::GetY
wxRect::Inflate
wxRect::Intersects
wxRect::IsEmpty

:-)