For example, the following sample file will replace the PRODNAME and PRODCODE variable definitions with the PRODUCT definition. The ReplaceVarChar parameter is set to "@" and that character is used as the first character in the "definition." This will only work if the PRODUCT variable format already exists, if it does not exist, you would use the "rename" feature for the first variable and the "replace" for the second.
[General] AltBookVarsFile= DeleteVarCode= RenameVarChar= ReplaceVarChar=@ UpdateMarkerVars=0 EditorType=0 [Groups] Count=1 1=MainGroup [MainGroup] ;VARIABLE=DEFINITION PRODNAME=@PRODUCT PRODCODE=@PRODUCT