This article is from the Programming VCOMM FAQ, by email@example.com (Taed Nelson) with numerous contributions by others.
VtoolsD by Vireo Software, Version 2.03. This contains a Vcomm port driver
class, and allows one to write VxDs in C or C++. They have a WWW page at
VXDMON by Mark Russinovich and Bryce Cogswell. This program uses the
Pentium's cycle counter to provide performance and control-flow information
and any and all exported Virtual Machine Monitor (VMM) and Virtual Device
Driver (VxD) services under Windows 95. Available at