Dim Buf_rnd As Long '用來暫時存放亂數值，等比對沒有重複後才存入儲存格
Dim i As Long
Dim j As Long
If rnd_end - rnd_start < cell_end - cell_start Then
MsgBox "產生不重複的亂數區間不可以比要產生亂數的儲存格的數值還要少。"
Exit Sub
End If
'產生亂數
For i = cell_start To cell_end
1 Buf_rnd = Int(Rnd() * (rnd_end - rnd_start + 1)) + rnd_start
'如果不是第1個儲存格就要往前比對。
If i > cell_start Then
For j = cell_start To i - 1
'如果重複了就跳到 1 重新產生亂數。
If Buf_rnd = Range(Mycol & j).Value Then GoTo 1
Next j
End If
Range(Mycol & i).Value = Buf_rnd
Next i
