>...syntax and use of "=execute" i.e. do =execute{"blah.spx")

function execute
lparameters tcProgName
do (tcProgName)

But what will be the use of such a function. I would simply directly "do blah.spx". "=" is not the execute but assign operator. When you don't need the return value of a function you simply write :

=myfunc()
* Which is equivalant
do myfunc
* So what's the difference =myfunc() and do myfunc
* when it has parameters there is an obvious difference
x=5
=myfunc(x)  && Parameter passed by val
? x  && 5
* vs do
x=5
do myfunc with x   && Parameter passed by ref
? x  && 10
* This one would also match do version
x=5
=myfunc(@x)  && Parameter passed by ref
? x  && 10

function myfunc
parameters tnNumber
tnNumber = tnNumber * 2
return

With VFP in most situations you don't even need to use "=" operator.
Cetin