local m.x
m.x=home((1)+"dv_foxhelp.chm"sethelpto m.x
this is set by default with help installation and Specifies a default Help file that is displayed when you press F1 or issue HELP. can dynamically specify another help file with this mecanism.
" set help off": Makes Visual FoxPro online Help unavailable.any help is fired when pressing F1 key