See this post in: Chinese Version or French Version

Private Sub Command1_Click()
　r = InputBox(”Enter a number please”) ‘ Enter a number to verify
　For i = 2 To r
　　　If Val(r) Mod i = 0 And i <> Val(r) Then ‘ this phase give a condition which is not a prime number
　　　　MsgBox (”The numbered you entered is not a prime number”)
　　　　Exit Sub
　　　End If
　Next i
　MsgBox (”The numbered you entered is not a prime number”)
End Sub


‘A list of number from 1 to 100
Private Sub Command2_Click()
　r = 100
　Me.Caption = 0
　Me.ForeColor = vbBlue
　For j = 1 To r
　　　For i = 2 To j
　　　　　If Val(j) Mod i = 0 And i <> Val(j) Then
　　　　　　Me.ForeColor = vbBlue ‘color of a not prime number
　　　　　　Exit For
　　　　　Else
　　　　　　Me.ForeColor = vbRed ‘color of a prime number
　　　　　End If
　　　Next i
　　Print ” ” & Format(j, “000″);
　　If Me.ForeColor = vbRed Then Me.Caption = Me.Caption + 1 ‘total of the prime number
　　If j Mod 10 = 0 Then Print
　Next j
End Sub