Create a matrix object, scale the matrix, and then use the matrix in the transform method of the GraphicsPath:
[VB]
Dim G As Graphics = Me.CreateGraphics
Dim pa as New GraphicsPath
pa.AddLine(......)
pa.AddBezier(......)
pa.AddLine(......)
pa.CloseFigure
draw the path before resize...
G.DrawPath(Pens.Black, pa)
Dim ma as New Matrix
scale the matrix by 150%...
ma.Scale(1.5, 1.5)
apply the matrix...
pa.Transform(ma)
draw the path after resize...
G.DrawPath(Pens.Black, pa)
[/VB]
Hope that helps.