Flash MX 2004.
matrix.b
Property; a floating-point value that specifies the (0,1) element in the matrix. This value represents the vertical skew of a shape; it causes Anim to move the shape’s right edge along the vertical axis. The matrix.b and matrix.c properties in a matrix represent skewing (see matrix.c).
In the following example, you can set b and c to -1 and 0, respectively; these settings skew the object at a 45º vertical angle:
var mat = fl.getDocumentDOM().selection[0].matrix; mat.b = -1;
mat.c = 0; fl.getDocumentDOM().selection[0].matrix = mat;To skew the object back to its original shape, you can set b and c to 0. See also the matrix.a example.