Contains classes required to implement a custom spreadsheet function.
Contains text descriptions of the argument passed to the User-Defined Function (UDF).
Contains the type and description for each argument of the User-Defined Function (UDF).
Determines the location of the formula and the culture used for correct formula evaluation.
A base class that allows you to override a built-in spreadsheet function.
Defines a parameter to pass to the custom function.
Contains data passed to the function or returned.
Obsolete. Use the ICustomFunction interface instead.
A collection of custom functions in a workbook.
Provides information on the worksheet, its current culture, the column and the row containing the cell for which a formula is calculated.
Defines properties and methods required to implement your own worksheet function.
Provides captions and text descriptions for the Function Argument dialog invoked for the custom function (UDF).
Defines properties and methods required for the worksheet function.
Provides access to worksheet functions and enables you to override a built-in function.
Lists parameter attributes.
Lists parameter types.