Dibujar Codigo de Barras (Bar Code)

Sub DrawBarcode(ByVal bc_string As String, sDescripcion As String, VLPrecio as String, obj As Control)

Dim xpos!, y1!, y2!, dw%, th!, tw, new_string$
Dim bc(90) As String
Dim sAux As String
Dim I As Byte

bc(1) = "1 1221" 'pre-amble
bc(2) = "1 1221" 'post-amble
bc(48) = "11 221" 'dígitos
bc(49) = "21 112"
bc(50) = "12 112"
bc(51) = "22 111"
bc(52) = "11 212"
bc(53) = "21 211"
bc(54) = "12 211"
bc(55) = "11 122"
bc(56) = "21 121"
bc(57) = "12 121"
'Letras Mayúsculas
bc(65) = "211 12" 'A
bc(66) = "121 12" 'B
bc(67) = "221 11" 'C
bc(68) = "112 12" 'D
bc(69) = "212 11" 'E
bc(70) = "122 11" 'F
bc(71) = "111 22" 'G
bc(72) = "211 21" 'H
bc(73) = "121 21" 'I
bc(74) = "112 21" 'J
bc(75) = "2111 2" 'K
bc(76) = "1211 2" 'L
bc(77) = "2211 1" 'M
bc(78) = "1121 2" 'N
bc(79) = "2121 1" 'O
bc(80) = "1221 1" 'P
bc(81) = "1112 2" 'Q
bc(82) = "2112 1" 'R
bc(83) = "1212 1" 'S
bc(84) = "1122 1" 'T
bc(85) = "2 1112" 'U
bc(86) = "1 2112" 'V
bc(87) = "2 2111" 'W
bc(88) = "1 1212" 'X
bc(89) = "2 1211" 'Y
bc(90) = "1 2211" 'Z
'Misceláneos Caracteres
bc(32) = "1 2121" 'Espacio
bc(35) = "" '# no se puede realizar
bc(36) = "1 1 1 11" '$
bc(37) = "11 1 1 1" '%
bc(43) = "1 11 1 1" '+
bc(45) = "1 1122" '-
bc(47) = "1 1 11 1" '/
bc(46) = "2 1121" '.
bc(64) = "" '@ no se puede realizar
bc(65) = "1 1221" '*

bc_string = UCase(bc_string) 'Convertir a mayúsculas

'Dimensiones
obj.ScaleMode = 2 'Pixeles
obj.Cls
obj.Picture = Nothing
dw = CInt(obj.ScaleHeight / 40) 'Espacio entre barras
If dw < 1 Then dw = 1
th = obj.TextHeight(bc_string) 'Alto texto
tw = obj.TextWidth(bc_string) 'Ancho texto
new_string = Chr$(1) & bc_string & Chr$(2) 'Agregar pre-amble, post-amble
y1 = obj.ScaleTop + 12
y2 = obj.ScaleTop + obj.ScaleHeight - 1.5 * th
obj.Width = 1.1 * Len(new_string) * (15 * dw) * obj.Width / obj.ScaleWidth

'Dibujar cada caracter en el string barcode
xpos = obj.ScaleLeft
For n = 1 To Len(new_string)
c = Asc(Mid(new_string, n, 1))
If c > 90 Then c = 0
bc_pattern$ = bc(c)
'Dibujar cada barra
For I = 1 To Len(bc_pattern$)
Select Case Mid(bc_pattern$, I, 1)
Case " "
'Espacio
obj.Line (xpos, y1)-(xpos + 1 * dw, y2), &HFFFFFF, BF
xpos = xpos + dw
Case "1"
'Espacio
obj.Line (xpos, y1)-(xpos + 1 * dw, y2), &HFFFFFF, BF
xpos = xpos + dw
'Línea
obj.Line (xpos, y1)-(xpos + 1 * dw, y2), &H0&, BF
xpos = xpos + dw
Case "2"
'Espacio
obj.Line (xpos, y1)-(xpos + 1 * dw, y2), &HFFFFFF, BF
xpos = xpos + dw
'Ancho línea
obj.Line (xpos, y1)-(xpos + 2 * dw, y2), &H0&, BF
xpos = xpos + 2 * dw
End Select
Next
Next

'Mas espacio
obj.Line (xpos, y1)-(xpos + 1 * dw, y2), &HFFFFFF, BF
xpos = xpos + dw

'Medida final y tamaño
obj.Width = (xpos + dw) * obj.Width / obj.ScaleWidth
obj.CurrentX = 1
obj.CurrentY = 1
If VLPrecio = "0.00" Then VLPrecio = ""
If xpos - obj.TextWidth(VLPrecio) - 10 < obj.TextWidth(sDescripcion) Then
sAux = ""
For I = 1 To Len(sDescripcion)
If xpos - obj.TextWidth(VLPrecio) - 10 < obj.TextWidth(sAux) Then
Exit For
Else
sAux = sAux & Mid(sDescripcion, I, 1)
End If
Next I
obj.Print sAux
Else
obj.Print sDescripcion
End If
obj.CurrentX = xpos - obj.TextWidth(VLPrecio)
obj.CurrentY = 1
obj.Print VLPrecio
obj.CurrentX = (obj.ScaleWidth - tw) / 2
obj.CurrentY = y2 + 0.25 * th
obj.Print bc_string

'Copiar a clipboard
obj.Picture = obj.Image
Clipboard.Clear
Clipboard.SetData obj.Image, 2
End Sub