I only have DBC, but this should work for Pro. I also assume you're probably using a matrix.
do
`Do stuff here
AngY#=Camera Angle y()
If inkey$="w" then move camera 25
If inkey$="s" then move camera -25
If inkey$="a"
Camx#=newxvalue(Camera Position x(),wrapvalue(AngY#-90),25)
Camz#=newzvalue(Camera Position z(),wrapvalue(AngY#-90),25)
Camy#=get ground height(1,camx#,camz#)+25
Position Camera camx#,camy#,camz#
endif
if inkey$="d"
Camx#=newxvalue(Camera Position x(),wrapvalue(AngY#+90),25)
Camz#=newzvalue(Camera Position z(),wrapvalue(AngY#+90),25)
Camy#=get ground height(1,camx#,camz#)+25
Position Camera camx#,camy#,camz#
endif
sync
loop
I hope this works.