You can call most built-in Microsoft Excel worksheet functions directly from a Microsoft Visual Basic for Applications macro. This article describes how to use a built-in worksheet function in a macro.
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Using a Worksheet FunctionYou can use most built-in worksheet functions in a macro by calling the function as a method of the Application object or the WorksheetFunction object. For example, to successfully call the ACOS worksheet function, you can use the following line of code in a macro:
NOTE: If you attempt to use a built-in worksheet function without qualifying the function with the Application or WorksheetFunction object, you may receive the following error message:
X = WorksheetFunction.Acos(-1)
Sub or Function Not DefinedVisual Basic for Applications provides many functions that are equivalent to the built-in worksheet functions in Microsoft Excel. However, not all of the built-in worksheet functions will work with the Application or WorksheetFunction objects. You cannot use a built-in worksheet function in a macro by calling the function as a method of the Application object or the WorksheetFunction object if there is an equivalent function in Visual Basic.
For additional information about the worksheet functions that are notsupported with the Application or WorksheetFunction objects, click the article number below to view the article in the Microsoft Knowledge Base:
213660 XL: Not All Worksheet Functions Supported As Methods of Application Object