The 
SpreadsheetGear.CustomFunctions namespace provides an API for defining custom functions which may be added to a workbook set.
            
Classes
| Class | Description | 
| Function  | 
            Override this class to implement a SpreadsheetGear for .NET custom function.
 | 
 
            
Interfaces
| Interface | Description | 
| IArguments  | 
            Represents the arguments of a custom function to the
            Function.Evaluate() method.
 | 
| IValue  | 
            Represents a simple value which may be empty, numeric, text, logical or an
            error.
 | 
 
            
            
            
Enumerations
| Enumeration | Description | 
| ValueType  | 
            Specifies the type of a value.
 | 
| Volatility  | 
            Specifies the volatility of a custom function.
 | 
 
            
            
See Also