External_Function FunctionName "FunctionName" DLLName {Parameters ...} Returns DataType
#IF !Zk=0 EXTERNAL$FUNCTION $54C LOAD_ON_USE GET_ !1 !2 !3 !4 !5 !6 !7 !8 !9 #ELSE EXTERNAL$FUNCTION $54D LOAD_ON_USE GET_ !1 !2 !3 !4 !5 !6 !7 !8 !9 #ENDIF