This article was previously published under Q103012
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In Windows NT, Windows 3.x virtual device drivers (VXDs) written for16-bit applications do not work.
Virtual device drivers were originally written to take advantage of386 enhanced mode functionality in previous versions of Windows (3.x).The VXDs registered themselves in the SYSTEM.INI file uponinstallation of the application that required their presence.
In Windows NT, these VXDs do not function properly. In most cases,these drivers talk directly to hardware by virtualizing the device tobe used. By design, Windows NT does not allow applications tocommunicate with the hardware directly. Applications that require theuse of VXDs must be rewritten to function properly with Windows NT.