My goal is to print labels with barcodes and a date stamp from an entry to a zebra TLP 2844 when the user clicks the ok button/hits enter. i found what i think might be the code for this from zebras site and have been integrating it into my program but part of it is depreciated and i cant quite figure out how to update it. below is what i have so far. The printer is attached via USB and the program will also store the entered numbers in a database but i have that part done. any help would be greatly Appreciated.
Public Class ScanForm
Inherits System.Windows.Forms.Form
Public Const GENERIC_WRITE = &H40000000
Public Const OPEN_EXISTING = 3
Public Const FILE_SHARE_WRITE = &H2
Dim LPTPORT As String
Dim hPort As Integer
Public Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String,
ByVal dwDesiredAccess As Integer,
ByVal dwShareMode As Integer, <MarshalAs(UnmanagedType.Struct)> ByRef lpSecurityAttributes As SECURITY_ATTRIBUTES,
ByVal dwCreationDisposition As Integer, ByVal dwFlagsAndAttributes As Integer,
ByVal hTemplateFile As Integer) As Integer
Public Declare Function CloseHandle Lib "kernel32" Alias "CloseHandle" (ByVal hObject As Integer) As Integer
Dim retval As Integer
<StructLayout(LayoutKind.Sequential)> Public Structure SECURITY_ATTRIBUTES
Private nLength As Integer
Private lpSecurityDescriptor As Integer
Private bInheritHandle As Integer
End Structure
Private Sub OKButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OKButton.Click
Dim TrNum
Dim TrDate
Dim SA As SECURITY_ATTRIBUTES
Dim outFile As FileStream, hPortP As IntPtr
LPTPORT = "USB001"
TrNum = Me.ScannedBarcodeText.Text()
TrDate = Now()
hPort = CreateFile(LPTPORT, GENERIC_WRITE, FILE_SHARE_WRITE, SA, OPEN_EXISTING, 0, 0)
hPortP = New IntPtr(hPort) 'convert Integer to IntPtr
outFile = New FileStream(hPortP, FileAccess.Write) 'Create FileStream using Handle
Dim fileWriter As New StreamWriter(outFile)
fileWriter.WriteLine(" ")
fileWriter.WriteLine("N")
fileWriter.Write("A50,50,0,4,1,1,N,")
fileWriter.Write(Chr(34))
fileWriter.Write(TrNum) 'prints the tracking number variable
fileWriter.Write(Chr(34))
fileWriter.Write(Chr(13))
fileWriter.Write(Chr(10))
fileWriter.Write("A50,100,0,4,1,1,N,")
fileWriter.Write(Chr(34))
fileWriter.Write(TrDate) 'prints the date variable
fileWriter.Write(Chr(34))
fileWriter.Write(Chr(13))
fileWriter.Write(Chr(10))
fileWriter.WriteLine("P1")
fileWriter.Flush()
fileWriter.Close()
outFile.Close()
retval = CloseHandle(hPort)
'Add entry to database
Using connection As New SqlClient.SqlConnection("Data Source=MNGD-LABS-APP02;Initial Catalog=ScannedDB;Integrated Security=True;Pooling=False;Encrypt=False"), _
cmd As New SqlClient.SqlCommand("INSERT INTO [ScannedDBTable] (TrackingNumber, Date) VALUES (@TrackingNumber, @Date)", connection)
cmd.Parameters.Add("@TrackingNumber", SqlDbType.VarChar, 50).Value = TrNum
cmd.Parameters.Add("@Date", SqlDbType.DateTime, 8).Value = TrDate
connection.Open()
cmd.ExecuteNonQuery()
connection.Close()
End Using
'Prepare data for next entry
ScannedBarcodeText.Clear()
Me.ScannedBarcodeText.Focus()
End Sub
