Declare Function Bezier Lib "splines.dll" (ByVal lRes As Long, ByVal lNumControl As Long, Cont As xyzTD, Curve As xyzTD) As Long
Declare Function Bspline Lib "splines.dll" (ByVal lRes As Long, ByVal gfTension As Single, ByVal lNumControl As Long, Cont As xyzTD, Curve As xyzTD) As Long
Declare Function TauSpline Lib "splines.dll" (ByVal lRes As Long, ByVal gfTension As Single, ByVal gfBias As Single, ByVal lNumControl As Long, Cont As xyzTD, Curve As xyzTD) As Long
Declare Function BetaSpline Lib "splines.dll" (ByVal lRes As Long, ByVal gfTension As Single, ByVal gfBias As Single, ByVal lNumControl As Long, Cont As xyzTD, Curve As xyzTD) As Long