Flash CS6.
Math.transformPoint(matrix, point)
MatrixContains the matrix obejct applied to the point.
PointContains the point to which the matrix is applied.
The transformed point.
PointMethod; Applies a matrix to a point.
The following example gets a matrix from the first object in Frame 1, creates a point with x:100 and y:200, and transforms this point using the matrix in the first line:
var mat = fl.getDocumentDOM().getTimeline().layers[0].frames[0].elements[0].matrix;
var point = {x: 100, y: 200};
var retPoint = fl.Math.transformPoint(mat, point);