note: noshow is in 1 word (instead "no show") and "?" dont exist in Select sql command.
in vfp you can use text/endtext to insert variables and evaluate them with textmerge and at runtime.
this is an example using Execscript() function,

local m.xfield
for i=1 to 3
do case 
case i=1
m.xfield="cust_id"
case i=2
m.xfield="company"
case i=3
m.xfield="address"
endcase

Text to m.myvar textmerge Noshow
sele < < m.xfield > >  from home(1)+"samples\data\customer" into cursor ycurs  &&cut 2spaces please in brackets
sele ycurs 
brow
Endtext
messagebox(m.myvar)
=execscript(m.myvar)
endfor

note: brackets are spaced for the ut editor only to make them visible (otherwise interpreted as HTML and rendered as this)-cut 2 spaces before running the code.
you can build a select statement with most variables between brackets (as textmerge)