Thank you very much Michael, it's exactly what i wanted.

Here's my code :

function extractCurveSharpControlPoints() {
	var gd = moi.geometryDatabase;	

	var obj = gd.getObjects(); // get all the objs
	
	var selCurves = gd.getSelectedObjects().getCurves(); // get all the selected curves
	
	if (selCurves.numStandaloneCurves != 1) {
		moi.UI.alert("Select alone Stand Alone Curve!");
		return;
	}
	
	// 1 - deselect everything and turn off all control points
	obj.setProperty('selected', 0);
	obj.setProperty('showPoints', 0);	
	
	var factory = moi.command.createFactory( 'fillet' );
	factory.setInput( 0, selCurves );
	
	// 2 - get corner points
	factory.generateVertices();
	var points = factory.getCreatedObjects();

	factory.cancel();
	
	// 3 - add the points to the geometry database
	gd.addObjects(points);
	
	// 4 - select the points
	points.setProperty('selected', 1);
}

extractCurveSharpControlPoints();

When possible i will integrate this code into the other code i want to write.

Thanks again!!!

P.S. I noticed that putting this code in a .js file copied into "script" folder, the job is done, but at the end i need to press "escape" key
in order to get the viewports reactive to the further user selection.
Instead, if I put this code into "commands" folder ALL is ok.

Marco (mkdm).