Custom Function that do no require Application Volatile Method To illustrate the above concepts, I refer to the custom Functions I previously wrote. Navigate to Excel Options to turn Workbook Calculation to Automatic, then your formula Cell will recalculate automatically if the relationship is in the Dependency Trees.Īccording to the above rules, Functions that do not depend on other changed cells would not recalculate, unless Application Volatile Method is used. Formulae dependent on changed or volatile formulae or cells or names.Excel builds “ Dependency Trees”, which keeps track on the following changes For example, you need to reference to a Range when you use SUM Function.Įxcel uses a special mechanism to minimize the number of calculation to speed up the process. The second kind needs to reference to other Cells and return a value. For example, you can use Rnd Function inside a custom Function to generate a number, therefore you don’t need any reference. The first kind does not need to reference to other Cells, the Function can have an argument with constant value or without an argument. Function is a Procedure that can take argument and return a value. In Excel VBA, you can create your own Functions, we call it User Defined Function (UDF), usually I simply call it custom Function. This Excel tutorial explains the use of Application Volatile Method to recalculate custom Function (User Defined Function).Įxcel Workbook Calculation Automatic and Manual Excel VBA Application Volatile Method
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