Insertion point MakeSketchBlockFromSelected

Hi All,

I'm having an issue controlling where my insertion point is located when I create a block using the API.  When I use the API, the point is always center of the height of the geometry, and way to the right.  I've inserted the drawing geometry at 0,0 when I import it, and I tried supplying an insertion point of 0,0 but it doesn't seem to change anything.  Here's the code I'm using, (the important parts anyway), nothing fancy:

SelectionMgr swSelMgr;

swSelMgr = (SelectionMgr)swModel.SelectionManager;

swModelDocExt.SelectAll();

// Write the block out.

MathUtility swMathUtil = swApp.IGetMathUtility();

MathPoint swMathPoint;

double[] nPt = new double[3] { 0.0, 0.0, 0.0 };

Object vPt = nPt;

swMathPoint = (MathPoint)swMathUtil.CreatePoint(vPt);

SketchBlockDefinition swBlockDefinition = null;

swBlockDefinition = ((SketchBlockDefinition)(swModel.SketchManager.MakeSketchBlockFromSelected(swMathPoint)));

string blockFileName = sDwgFileName.Replace(".dwg", ".sldblk");

swBlockDefinition.Save(blockFileName);

swModel.EditDelete();

Am I doing something wrong?  When I create the block by hand, the insertion point is always the lower left corner of the geometry bounding box - I initially thought that would be the default behavior in the API as well - I was obviously wrong.

Any help would be appreciated - thanks!

SolidworksApi macros