VERSION 5.00
Begin VB.Form Form1
   Caption         =   "binary counter"
   ClientHeight    =   1020
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   1020
   ScaleWidth      =   4680
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton Command1
      Caption         =   "&start counting"
      Height          =   495
      Left            =   480
      TabIndex        =   0
      Top             =   240
      Width           =   3855
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Declare Function Inp Lib "inpout32.dll" _
Alias "Inp32" (ByVal PortAddress As Integer) As Integer
Private Declare Sub Out Lib "inpout32.dll" _
Alias "Out32" (ByVal PortAddress As Integer, ByVal Value As Integer)
Private Declare Sub Sleep Lib "Kernel32" (ByVal dwMilliseconds As Long)


Private Sub Command1_Click()
Port1 = 888 'same as 0x378
Dim x As Integer
For x = 0 To 255
Out Port1, x
Sleep (250) '250ms delay
Next x
End Sub