In addition to Jim's reference:
Some sample code for accessing serial data in VFP using MSCOMM32 can be
found in the following:
http://support.microsoft.com/support/kb/articles/Q139/5/26.asp - HOWTO: Send to the Serial Port by Using Mscomm32.ocx.
And of course,
http://support.microsoft.com/support/kb/articles/Q154/7/41.asp - HOWTO: Transmit and Receive Binary Data using MSCOMM32.

Rick