LBOUND(arrayname [,dimension])

Returns the smallest subscript in a given dimension of an array (Long).

arrayname	The name of the array (Variant).
dimension	(Optional) The number of the dimension to use (Long).

REMARKS

* You cannot prefix this function with "VBA."
* If "dimension" = 1, then the first dimension of the array is used.
* If "dimension" = 2, then the second dimension of the array is used.
* If "dimension" is left blank, then 1 is used.
* The default lower bound for any dimension is either 0 or 1, depending on the Option Base statement.
* You can use the UBOUND function to find the upper limit of an array dimension.
* The equivalent .NET function is Microsoft.VisualBasic.Information.LBound
* This function is not available in Access.
* For the Microsoft documentation refer to docs.microsoft.com

Dim avTemporary(1 To 100, 0 To 3, -3 To 4) As String 

Debug.Print LBound(avTemporary)      '= 1  
Debug.Print LBound(avTemporary, 1)   '= 1  
Debug.Print LBound(avTemporary, 2)   '= 0  
Debug.Print LBound(avTemporary, 3)   '= -3