Returns the area inside the curve
(vlax-curve-getArea curve-obj)
Arguments
The VLA-object to be measured.
Return Values
A real number representing the area of the curve, if successful; otherwise nil.
Examples
Assume the curve being measured is the ellipse in the following drawing:

Sample curve (ellipse) for vlax-curve-getarea
The ellipseObj variable points to the ellipse VLA-object.
The following command obtains the area of the curve:
(vlax-curve-getArea ellipseObj) 4.712393