Once the DLL is correctly placed, follow these steps to use it: Open your report in Crystal Reports. Go to > Formula Workshop . Expand Functions > Additional Functions .

reg query HKCR\CLSID /f u25idautomation.dll

Once installed, the functions appear in the under Additional Functions -> Visual Basic Functions (or COM Functions , depending on your version). A typical formula would look like: IDAutomation_Code128(Table.Field)