I want to edit cells text in “ACAD_TABLE” entity using visual lisp.

[mmesoft]

I want to edit cells text in “ACAD_TABLE” entity using visual lisp.
I have studied its group codes for “ACAD_TABLE” entity and group code 302 refers to text in each cell
Now I want to modify these texts.  
I want to change the original value with new value.
For example cell number A1 having value ABC and now I want to change it as XYZ.
I m using Autodesk Auto Cad 2014 version("19.1s (LMS Tech)")

Please help me on this.