by Mark Duhame (2 Submissions)
Category: Complete Applications
Compatability: VB Script
Difficulty: Advanced
Date Added: Wed 3rd February 2021
Rating: 
(3 Votes)
Perform at ring0 level. Shows how to operate at ring0 from visual basic several ways, int 20, calls and deviceiocontrol. Hopefully this program and the included documentation will help you in some way. GDT, LDT, IDT, status control registers and flags, VxD's, service calls all explained and with good documentation. Many examples in the program. Check it out.
Assumes
Especially read these included files:
GDT_info.txt a great article by Yann Stephen to
give an explantion on how the protected mode works.
vmm.inc - useful information.
assmTut_vxd.txt - The basic file used to create the blue screen of death Message.
The vxd is accessed via deviceiocontrol. There is 1 service call and that is the blue screen that appears. from a call to SHELL_SYSMODAL_MESSAGE
services.dat - lists the major ring0 service calls
Download Protected Mode (81 KB)
VBcoders