Can template memorize external variable by MQL4 ?

Moo Hey  
I have a MQL4 program that sets an extern string. When I save the template it does not register the modified value. Is this possible ?
William Roeder  
Moo Hey: I have a MQL4 program that sets an extern string. When I save the template it does not register the modified value. Is this possible ?

Not possible. Templates save the compiled value.

Reason: