## ALP Programming Guide and Reference

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### Examples

    L _ MASK      equ   011100000000y               ;   mask   to   isolate   language   bits
    L _ OPTLINK   equ   011100000000y               ;   setting   for   OptLink   calling   convention
    VerifyCallBack   macro   ProcName
       if   ( ( ( OPATTR   ( ProcName ) )   and   L _ MASK )   ne   L _ OPTLINK )
          . err   < Call - back   routine   must   have   OptLink   linkage >
       endif
    endm