![](dotnetdiagramimages/GrapeCity_WPF_CalcEngine_GrapeCity_CalcEngine_Functions_CalcDurationFunction.png)
'Declaration Public Class CalcDurationFunction Inherits CalcBuiltinFunction
'Usage Dim instance As CalcDurationFunction
public class CalcDurationFunction : CalcBuiltinFunction
System.Object
GrapeCity.CalcEngine.Functions.CalcFunction
GrapeCity.CalcEngine.Functions.CalcBuiltinFunction
GrapeCity.CalcEngine.Functions.CalcDurationFunction