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Some correct examples of VC_USING commands follow.
Example 1: Accumulate real fields TOT01 -> TOT05 into virtual field TOTAL:
C*
C* VC_USING FIELDS(TOT01 TOT02 TOT03 TOT04 TOT05 TOTAL)
C*
C Z-ADDTOT01 TOTAL
C ADD TOT02 TOTAL
C ADD TOT03 TOTAL
C ADD TOT04 TOTAL
C ADD TOT05 TOTAL
Some points to note about this example are:
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If this example virtual field code section was actually compiled into the file I/O module it would look something like this:
FIELD REPLACEMENT VALUES USED FOR THIS SECTION OF USER CODE
*
* Field name as Field name as in Internal field name
*in file definition user RPG code used as replacement
*----------------- -------------- ------------------
* TOT01 TOT01 @F0001
* TOT02 TOT02 @F0002
* TOT03 TOT03 @F0003
* TOT04 TOT04 @F0004
* TOT05 TOT05 @F0005
* FULLTOTAL FFFFFF @F0006
*
C Z-ADD@F0001 @F0006
C ADD @F0002 @F0006
C ADD @F0003 @F0006
C ADD @F0004 @F0006
C ADD @F0005 @F0006
Again the VC_USING command has been replaced by a series of comments that detail exactly what effect it has had on the following code. Also note how all fields listed in the VC_USING command have been replaced by their "internal" names, particularly the name "FFFFFF".
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