As I recall, VB6 came with a CR version 4.5 which was not a public release. VB6 promoted the use of the MS Report Designer in VB6, and you had to manually installif you wanted to use it.
VS Studio 2003 came with a the CR software v.9 of CR.
Here is the link to the free Business Object viewer if you are interested,
http://diamond.businessobjects.com/node/3537
Here is a brief summary at this link,
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Tired of exporting to PDF, Microsoft Excel, or other formats and losing Crystal Reports functionality? This is now a thing of the past. On May 29, 2007, Business Objects launched a new beta program for a standalone Crystal reports viewer.
The new viewer enables Crystal Reports users to view, interact, and distribute with reports in the native .rpt format.
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Regards,
John W.