Private Sub Command1_Click()
Dim a(1 To 62) As String
For i = 0 To 9
a(i + 1) = i
Next
For i = 1 To 26
a(10 + i) = Chr(64 + i)
a(36 + i) = Chr(96 + i)
Next
'MsgBox Join(a, "")
Dim b(1 To 5) As String
Randomize
For i = 1 To 5
b(i) = a(Int(Rnd * 62 + 1))
Next
MsgBox Join(b, "")
End Sub