VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   3  'Windows Default
   Begin VB.TextBox Text1 
      Height          =   375
      Left            =   3960
      TabIndex        =   1
      Text            =   "4"
      Top             =   480
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   375
      Left            =   3480
      TabIndex        =   0
      Top             =   0
      Width           =   1215
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Sub hilbert(x0, y0, xis, xjs, yis, yjs, n)

'/* x0 and y0 are the coordinates of the bottom left corner */
'/* xis & xjs are the i & j components of the unit x vector this frame */
'/* similarly yis and yjs */
If (n < 0) Then
   Line -(x0 + (xis + yis) / 2, y0 + (xjs + yjs) / 2)
Else
   Call hilbert(x0, y0, yis / 2, yjs / 2, xis / 2, xjs / 2, n - 1)
   Call hilbert(x0 + xis / 2, y0 + xjs / 2, xis / 2, xjs / 2, yis / 2, yjs / 2, n - 1)
   Call hilbert(x0 + xis / 2 + yis / 2, y0 + xjs / 2 + yjs / 2, xis / 2, xjs / 2, yis / 2, yjs / 2, n - 1)
   Call hilbert(x0 + xis / 2 + yis, y0 + xjs / 2 + yjs, -yis / 2, -yjs / 2, -xis / 2, -xjs / 2, n - 1)
End If
End Sub

Private Sub Command1_Click()
Call hilbert(0, 0, 3000, 0, 0, 3000, Text1)
End Sub