'Declaration
Public Sub DrawHorizontalThumbGrip( _
ByVal As Graphics, _
ByVal As Rectangle, _
ByVal As FpScrollBarButton _
)
'使用法
Dim instance As FlatScrollBarRenderer
Dim g As Graphics
Dim bound As Rectangle
Dim element As FpScrollBarButton
instance.DrawHorizontalThumbGrip(g, bound, element)