>Please tell me how I can able to modify programmatically change Page size in reports. Like A4 to Letter or Legal. And any other option which VFP provide to change on run time or programmatically.

Javed, to go a little further beyond what Sergey said, there are "reports" which ship with VFP that describe the structure of the FRX table. Mine are in C:\Program Files\Microsoft Visual FoxPro 7\Tools\Filespec\60frx1.frx and 60frx2.frx.