できた
Dim x as Integer, y As Integer, sen as Boolean
Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
  Select Case KeyCode
    Case 39 : x = x + 1
    Case 40 : y = y + 1
    Case 37 : x = x - 1
    Case 38 : y = y - 1
    Case 13
      y = y + 1
      x = 0
  End Select
  Me.Refresh
End Sub
Private Sub Form_Paint()
  Me.PSet (0, 0)
  Me.FontName = "MS ゴシック"
  Me.Font.Size = 16
  Me.Font.Bold = True
  Print "あいうえお"
  Print "かきくけこ"
  Print "さしすせそ"
  If sen Then Line (x * 20, y * 20)-(x * 20, y * 20 + 20)
End Sub
Private Sub Timer1_Timer()
  If sen Then sen = False
  Else sen = True
  Me.Refresh
End Sub