## Using Your DDK

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### Virtual Touch Display Device Driver

Driver Description:

The Virtual Touch Display Device Driver provides a virtualized DOS INT 7FH API for Multiple DOS Sessions. Touch events are simulated in the VDM using IRQ 12/ INT 74, which is shared with VMOUSE.SYS when using a PS/2 Mouse.

Compilers/Assemblers Required:

         Microsoft MASM 5.1      (supplied with the DDK)
         Microsoft CL386         (supplied with the DDK)

Build Instructions:

1.Set the environment variables so the correct tools are picked up during the build.

    e.g., SET PATH=<drive>:\DDK\TOOLS;%PATH%

Where <drive> represents your DDK installed drive and DDK represents the DDK installed directory. On the CD-ROM, the TOOLS directory path is DDK\ TOOLS.

2.Change the directory to DDK\BASE\SRC\VDEV\VTOUCH.

3.Invoke NMAKE on the resident makefile.

Files Created by Successful Build:

         Directory:  \DDK\BASE\SRC\VDEV\VTOUCH

         o  VTOUCH.SYS
         o  VTOUCH.COM
         o  TOUCHCOM.EXE