#42 clarified message index

levelObjects/10_Barriers/levelBarrierEntry.md

@@ -18,8 +18,8 @@
     0006  int16    Second door object index
 
 
-The ```Lock variable index``` determines whether a door is locked. If the referenced boolean variable is 1, then the door won't open when used. While locked, the message according to ```Lock message``` is shown (```0x00``` gives the default "The door is locked").
-If the door is triggered by other means, the door is unlocked and the index is reset to zero.
+The ```Lock variable index``` determines whether a door is locked. If the referenced boolean variable is 1, then the door won't open when used. If the door is triggered by other means, the door is unlocked and the index is reset to zero.
+Using the door while being locked, the message according to ```Lock message``` is shown. The message index is into the text chunk ```0x0871```, with a block offset of ```7```. (```0x00``` gives the default "The door is locked" at index ```7```).
 
 The ```Required access level``` indicates which [access level](../content/AccessLevels.md) the hacker needs to activate
 (open) the door. If zero, no special access is required. This values is ```0xFF``` for doors "locked by SHODAN level security".