sketching points with respect to a new coordinate system

[maryam200]

Hi everyone
I am preparing a C# code which creates a 3D shape in SolidWorks.I have created a plane.it has a angle of 30(first reference) and it is based on a line(second reference). now I want to sketch some points on this plane. I have the coordinates of these points and I have put these points in an array in my C# code. then I sketch points in solidworks using this code:

skPoint = ((SketchPoint)swDoc.SketchManager.CreatePoint(pp[j, 0], pp[j, 1], 0)));


Now I want to put the coordinate system of the plane on the line which the plane is created based on, so that the points is sketched in this new coordinate system. i tried to create a refrence coordinate system in that place but I dont know how I should sketch the points in this coordinate system.

Thanks