type LongBool = Boolean attribute (Size = BitSizeOf (LongInt));
The intrinsic LongBool represents boolean values, but occupies the same memory space as a LongInt. It is used when you need to define a parameter or record that conforms to some external library or system specification.
LongBool is a Borland Pascal extension.
program LongBoolDemo; var a: LongBool; begin LongInt (a) := 1; if a then WriteLn ('Ord (True) = 1') end.
Boolean (Intrinsic), Boolean, True, False, CBoolean, ByteBool, ShortBool, MedBool, WordBool, LongestBool.