On a 64-bit Windows Vista or Windows 7 computer, both 64-bit and 32-bit cruflbcs.dll can be used. To generate bar code on a 64-bit Windows Vista or Windows 7 computer, you need to download and register the 64-bit cruflbcs.dll from the link above.
There are two versions of RegSvr32.exe on a 64-Bit version Windows operating system.
The 64-bit version is %systemroot%\System32\regsvr32.exe.
The 32-bit version is %systemroot%\SysWoW64\regsvr32.exe.
The 64-bit crUFLBcs.dll needs to be registered with 64-bit version of regsvr32.exe located at %systemroot%\System32\regsvr32.exe.
The 64-bit crUFLBcs.dll supports all linear and 2D barcode symbologies: Code39, Code128, GS1-128, Code93, UPC-A, EAN13, GS1-Databar, Intelligent Mail barcode, Data Matrix, PDF417, QRCode, Aztec code.
The 64-bit crUFLBcs.dll also works with 64-bit Windows applications to generate bar codes.