INTERVAL_LIMIT_KIND enumeration
These values are returned by IInterval::GetLimits as pairs to specify a range with an upper and lower limit. INTERVAL_LIMIT_KIND identifies whether the ranges include or exclude the upper and lower values of the range, and whether a range begins or ends in infinity.
Syntax
typedef enum tagINTERVAL_LIMIT_KIND { ILK_EXPLICIT_INCLUDED = 0, ILK_EXPLICIT_EXCLUDED = 1, ILK_NEGATIVE_INFINITY = 2, ILK_POSITIVE_INFINITY = 3 } INTERVAL_LIMIT_KIND;
Constants
 ILK_EXPLICIT_INCLUDED

The value is included in the range. For example, an integer range of numbers that is equal to or greater than 3 and less than or equal to 6 includes both 3 and 6. So the values 3 and 6 would both be returned with ILK_EXPLICIT_INCLUDED.
 ILK_EXPLICIT_EXCLUDED

The value bounds the range but is not included in the range. For example, an integer range that is greater than 3 but less than 6 excludes both 3 and 6. So the values would both be returned with ILK_EXPLICIT_EXCLUDED.
 ILK_NEGATIVE_INFINITY

This is typically used as a lower bound. The specified value is ignored because the range begins (or ends) at negative infinity. For example, an integer range that includes every value less than 6 would have ILK_NEGATIVE_INFINITY for the lower bound and 6 and ILK_EXPLICIT_EXCLUDED for the upper bound.
 ILK_POSITIVE_INFINITY

This is typically used as an upper bound. The specified value is ignored because the range begins (or ends) at positive infinity. For example, an integer range that includes every value greater than or equal to 3 would have ILK_EXPLICIT_INCLUDED and 3 for the lower bound and ILK_POSITIVE_INFINITY for the upper bound.
Requirements
Minimum supported client  Windows XP with SP2, Windows Vista [desktop apps only] 

Minimum supported server  Windows Server 2003 [desktop apps only] 
Redistributable  Windows Desktop Search (WDS) 3.0 
Header 

IDL 
