The OpenInsight for Workgroups 3.1 Programmer's Reference documentation lists incorrect values for the virtual key codes of the SHIFT, CONTROL, and ALT keys.
The correct decimal values are:
256 SHIFT
512 CTRL
1024 ALT
The correct hexadecimal values are:
0x100 SHIFT
0x200 CTRL
0x400 ALT
This information will be incorporated into the updated 3.1 help file which will be included in the OpenInsight 3.11 maintenance release.