LOCKUI system variable
Function Description:
The LOCKUI system variable is used to lock the location and size for tool bar and dock able windows (such as design center and property palettes).
Type : Bitcode 
Saved in : Registry 
Initial value : 0 
Range : 0 ~ 15
The locked toolbar and windows still could open or close, and add or delete items. Pressing Ctrl key to temporarily unlock.
System Variable Value:
0 : do not lock toolbars and windows
1 : docked toolbar locked 
2 : docked or anchored windows locked
4 : floating toolbars locked 
8 : floating windows locked