Windows NT Does Not Support Hardware Keys ("Dongles")

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Hardware keys usually require a device driver that has direct access to hardware. Software vendors who use hardware keys need to write a special MS-DOS-based device driver and a virtual device driver (VDD) to allow their applications to run with Windows NT.

The following products require such drivers:

• Micro Focus COBOL uses a hardware key and does not have device drivers available at this time to support Windows NT.
• Tango Schematic
• Tango PCB (printed circuit board)
• Tango Route
• Clarity fails under Windows NT 3.51 because it cannot locate the hardware key.

The listed products are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding their performance or reliability.