Sub nestLoop()
Dim I As Integer
Dim J As Integer
Dim K As Integer
Dim myArray(99, 99, 2) As Integer
For K = 0 To 2 'Worksheet index
For J = 0 To 99 'Column index
For I = 0 To 99 'Row index
myArray(I, J, K) = Worksheets(K + 1).Cells(I + 1, J + 1).Value
Next I
Next J
Next K
End Sub