Add help info to UDF

[hugo francisco jiménez novoa]

Hi everyone, just a quick question here... It is possible to add help information to a UDF to let the user know how the UDF works and what the possible errors are, and the data is needed for the UDF to function properly?

I want Excel to display that help info like any native formula. If possible...

Appreciate any help you can give me.

[#2 · Accepted solution]

@hugo francisco jiménez novoa 

You can use Application.MacroOptions. Here is a very simple example:

Function CelsiusToFahrenheit(t As Double) As Double
 CelsiusToFahrenheit = 1.8 * t + 32
End Function

Sub AddDescriptiom()
    Application.MacroOptions Macro:="CelsiusToFahrenheit", _
       Description:="Convert Celsius to Fahrenheit", _
       ArgumentDescriptions:=Array("Temperature in degrees Celsius")
End Sub

Running the AddDescription macro adds a description of the function as a whole and of its arguments. These will be used if you press fx when creating a formula:

[#3]

@Hans Vogelaar extraordinary...! I will try it. Thank you so much...