Interface  Description 

FreeRefFunction 
For most Excel functions, involving references ((cell, area), (2d, 3d)), the references are
passed in as arguments, and the exact location remains fixed.

Function 
Common interface for all implementations of Excel builtin functions.

Function0Arg 
Implemented by all functions that can be called with zero arguments

Function1Arg 
Implemented by all functions that can be called with one argument

Function2Arg 
Implemented by all functions that can be called with two arguments

Function3Arg 
Implemented by all functions that can be called with three arguments

Function4Arg 
Implemented by all functions that can be called with four arguments

Operator 
Marker interface for function accept one argument or two arguments.

XYNumericFunction.Accumulator 
Class  Description  

Address 
Creates a text reference as text, given specified row and column numbers.


AggregateFunction  
BooleanFunction 
Here are the general rules concerning Boolean functions:
Blanks are ignored (not either true or false)
Strings are ignored if part of an area ref or cell ref, otherwise they must be 'true' or 'false'
Numbers: 0 is false.


BooleanFunction.OneArg  
CalendarFieldFunction 
Implementation of Excel functions Date parsing functions:
Date  DAY, MONTH and YEAR
Time  HOUR, MINUTE and SECOND


Choose  
Column  
Columns 
Implementation for Excel COLUMNS function.


Complex  
ComplexFormat  
Count 
Counts the number of cells that contain numeric data within
the list of arguments.


Counta 
Counts the number of cells that contain data within the list of arguments.


Countblank 
Implementation for the function COUNTBLANK
Syntax: COUNTBLANK ( range )
range is the range of cells to count blanks
