Public Class Form1
Dim num(6), i As Integer
Dim T As Boolean
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
ListBox1.Items.Clear()
i = 0
Do While i < 6
Dim generator As New Random
Dim randomValue As Integer
randomValue = generator.Next(1, 50)
num(i) = randomValue
T = True
If i > 0 Then
For r = 0 To i - 1
If num(i) = num(r) Then
T = False
Exit For
End If
Next
End If
If T = True Then i += 1
Loop
For s = 0 To 5
ListBox1.Items.Add(num(s))
Next
End Sub
End Class