TBCUSTOMIZE system variable
Function Description:
The TBCUSTOMIZE system variable is used to control whether users could customize tool palette groups.
Type : Parameter 
Saved in : Registry 
Initial value : 1 
Range : 0,1
It controls whether the CUSTOMIZE command could used for customizing tool palette groups, and whether display Custom option in toolbar shortcut menu.
System Variable Value:
0 : disable access customization 
1 : enable access customization