CALL "C$PROGINMEM" USING progName                     GIVING returnCode  | 
progName   | PIC X(n)   | Specifies the program to check.  | 
-1   | wrong parameters.  | 
0   | program not loaded.  | 
1   | program already loaded.  | 
call "c$proginmem" using "computetax" if return-code not = 1    display message "ComputeTax is not in memory" end-if  |