Sage 2014 button to call crystal report

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When I search the subject on the forum, there's too many fragmented responses.

The goal is to run a Crystal report from the CI_it (Inventory Maint) panel.

Hoping someone can share a bit of code that works on Sage 2014.

Our Sage upgrade is around the corner, but I need to get something in the mean time.

I don't normally use buttons, but you the old saying.

The report name is SLAB_DESC-custom.RPT

The report has one parameter; the ItemCode which needs to come from the panel button click.

Thanks for any help