Obtain The Array Values Of A Function

How can I obtain the array values from a function?

For example: Those steps were made by cytop to split a text (btw it works perfecet!!), I just added Function splitText(strSplit As Variant) As Variant ... End Function

VB:
Function splitText(strSplit As Variant) As Variant
Dim datosColumnaIncio() As Variant
Dim iTemp As Integer
Redim datosColumnaIncio(Len(strSplit) - 1)
For iTemp = 1 To Len(strSplit)
datosColumnaIncio(iTemp - 1) = Mid$(strSplit, iTemp, 1)
Next
End Function

So I want to know if its correct like that:

VB:
Function splitText(strSplit As Variant) As Variant
Dim datosColumnaIncio() As Variant
Dim iTemp As Integer

[Code] .....

So when I call the function:

VB : MsgBox splitText("F4")

It throws an error message :s what is wrong or how can I get the array values of a function ???