This keyword is used after a CHAPTER statement. The presence of the HIDE keyword will cause all existing properties or controls within the named chapter at that point in the property set parsing to be hidden.
Syntax
CHAPTER <name> [HIDE] [AND_SUBTYPES]
The AND_SUBTYPES option indicates that the hiding of the chapter should also be processed in subtypes which are definitions which inherit from the definition being defined.
Example
CHAPTER <name> HIDE PROPERTY "x" { edit text }
In this example, all properties will be hidden, and then another property added to the same chapter.