If you're asking again, there must be something wrong with your help file. I would try uninstalling and then reinstalling Office. Here's the first few lines, direct from help.
Code:
Keycode Constants
The following constants can be used anywhere in your code in place of the actual values:
Constant Value Description
vbKeyLButton 0x1 Left mouse button
vbKeyRButton 0x2 Right mouse button
vbKeyCancel 0x3 CANCEL key
I'll just add a comment to this post. When I was trying to find keycode constants using the help, I discovered that you had to be in the VBA Help, not the Regular Access Help. If you click on help while you are in VB you will be able to search KeyCode Constants.