Right-click My Computer > Properties > General Tab. If the
20-character Product ID consists of entirely numbers, the installation
was performed using either a retail or Volume Licensed CD and Product
Key. An OEM license will contain the letters "OEM" in the Product ID.
Programmatically, scan the registry to read the value of
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ProductID.
--
Bruce Chambers
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