Is Two Dimension Array Empty

I'm trying to write a function that I can pass an array along with the data I want added to that array. The function will resize the array, put the data into it and return the new array. Example:

Function AddNewDataToArray(MyArray As Variant, Arg1 As String, Arg2 As String, Arg3 As String) As Variant
'If no elements have been added
Redim Preserve MyArray(1 To 3, 1 To 1)
'Add the first record of data to the array.

'If there is already data in the array
Redim Preserve MyArray(1 To 3, 1 To UBound(MyArray, 2))
'Add the next record of data to the array
End Function

As 2 dimensional arrays are Base 1, the challenge I have is getting it to resize (redim preserve) the array when it has to add the first record. I thought I could just use an IsArray function to test if there had been any data added. If not, then it would run the following...........