CARA: Menentukan Printer Status dan Status pekerjaan cetak dari Visual Basic

Artikel ini menjelaskan cara menggunakan Windows application programming interface (API) fungsi dalam Visual Basic untuk menentukan printer status atau status pekerjaan cetak pemrograman. Meskipun aplikasi tidak biasanya harus memeriksa status printer sebelum pencetakan, itu mungkin berguna untuk menentukan status printer atau mencetak pekerjaan pemrograman.

Deskripsi teknik

Istilah "printer" dapat merujuk pada perangkat keras, antrian, driver, atau bahkan sebuah port. Pada artikel ini, istilah "printer" didefinisikan sebagai antrian pencetakan lokal. Kode contoh dalam artikel ini kembali status bahwa sistem operasi laporan. Ini adalah status yang sama bahwa the spooler laporan, yang Anda dapat memeriksa dengan menonton antrian pencetakan lokal.

Sebagai contoh, untuk melihat antrian di komputer yang menjalankan Microsoft Windows 98, klik Mulai, arahkan ke Tataan, klik Printer, kemudian klik dua kali ikon untuk printer yang antrian yang ingin Anda lihat.

CATATAN: Anda tidak dapat berkomunikasi langsung dengan printer fisik. Anda tidak harus melakukan ini karena sistem operasi harus arbitrase akses ke perangkat keras.

Kode contoh dalam artikel ini meneliti antrian pencetakan lokal, yang memperoleh informasi dari port monitor, yang pada gilirannya berkomunikasi dengan perangkat fisik. Untuk penjelasan lebih rinci tentang bagaimana ini bekerja, lihat artikel yang didaftar di bagian "Referensi" dari artikel ini.

Sampel ini laporan status dari printer dan dari pekerjaan, tetapi perhatikan bahwa informasi status pekerjaan secara umum lebih dapat diandalkan untuk aplikasi. Idealnya, Anda harus memeriksa pekerjaan dan status printer secara terpisah, dan kode harus menyimpulkan status "meta" antrian. Namun, bagi sebagian besar menggunakan, kode Anda dapat bergantung pada status pekerjaan. Juga, contoh ini loop melalui pekerjaan dan cek dan laporan status pekerjaan masing-masing. Hal ini karena pekerjaan Anda dapat mengikuti pekerjaan lain yang melaporkan masalah, seperti berada di luar kertas atau mendapatkan macet.

CATATAN: Sistem hanya memeriksa status ketika sistem memiliki pekerjaan untuk menghimpun. Jika tidak, antrian dianggap "siap" karena antrian bisa menerima pekerjaan, bahkan jika perangkat keras berada dalam kesalahan negara. Sebagai contoh, jika pekerjaan terakhir yang dicetak digunakan terakhir potongan kertas, sistem operasi tidak tahu ini sampai sistem mencoba untuk mencetak lagi.

Selain itu, meskipun ada banyak status yang dapat dilaporkan, banyak yang tidak didukung dalam praktek. Perangkat keras printer dan port monitor menentukan status yang laporan. Sebagai contoh, jika printer kertas dan offline, status mungkin dilaporkan sebagai "Pencetakan" karena itulah apa pekerjaan coba lakukan. Oleh karena itu, antrian yang menampilkan "Siap" tidak menjamin bahwa Anda pencetakan akan selesai dengan sukses.

Sampel kode ini meneliti hanya antrian lokal, yang harus cukup untuk sebagian besar aplikasi. Namun, menghubungkan ke printer jauh dapat menjadi cukup kompleks. Anda dapat dirantai antrian, di mana port untuk antrian lokal adalah benar-benar lain antrian. Anda dapat memiliki printer penggabungan, di mana beberapa printer bekerja dari antrian super umum. Ketika arsitektur menjadi lebih kompleks, kode untuk mengambil status bermakna juga menjadi lebih kompleks, dan kegunaan status berkurang.

Pada Microsoft Windows 95, Microsoft Windows 98, dan Microsoft Windows Millennium Edition hanya, Anda juga dapat memeriksa PrinterInfo.Attributes lapangan untuk bit PRINTER_ATTRIBUTE_WORK_OFFLINE. Negara ini adalah sesuatu yang biasanya terjadi karena tindakan pengguna (misalnya, jika pengguna klik-kanan ikon printer dan kemudian klik Bekerja secara Offline). Negara ini tidak terjadi karena perubahan negara pekerjaan pencetakan, meskipun sistem operasi dapat memaksa negara jika printer tidak dapat terhubung ke despool pekerjaan. Dalam hal ini, status biasanya dilaporkan sebagai USER_INERVENTION_REQUIRED.

Contoh langkah demi langkah

1. Buat projek Standard EXE yang baru dalam Visual Basic. Secara default, Form1 dibuat.
2. Pada Project menu, klik Menambahkan modul, dan kemudian tambahkan kode berikut:

   Option Explicit
   
   Public Declare Function lstrcpy Lib "kernel32" _
      Alias "lstrcpyA" _
      (ByVal lpString1 As String, _
      ByVal lpString2 As String) _
      As Long
   
   Public Declare Function OpenPrinter Lib "winspool.drv" _
      Alias "OpenPrinterA" _
      (ByVal pPrinterName As String, _
      phPrinter As Long, _
      pDefault As PRINTER_DEFAULTS) _
      As Long
   
   Public Declare Function GetPrinter Lib "winspool.drv" Alias "GetPrinterA" _
      (ByVal hPrinter As Long, _
      ByVal Level As Long, _
      pPrinter As Byte, _
      ByVal cbBuf As Long, _
      pcbNeeded As Long) _
      As Long
   
   Public Declare Function ClosePrinter Lib "winspool.drv" _
      (ByVal hPrinter As Long) _
      As Long
   
   Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _
      (Destination As Any, _
      Source As Any, _
      ByVal Length As Long)
   
   Public Declare Function EnumJobs Lib "winspool.drv" Alias "EnumJobsA" _
      (ByVal hPrinter As Long, _
      ByVal FirstJob As Long, _
      ByVal NoJobs As Long, _
      ByVal Level As Long, _
      pJob As Byte, _
      ByVal cdBuf As Long, _
      pcbNeeded As Long, _
      pcReturned As Long) _
      As Long
      
   ' constants for PRINTER_DEFAULTS structure
   Public Const PRINTER_ACCESS_USE = &H8
   Public Const PRINTER_ACCESS_ADMINISTER = &H4
   
   ' constants for DEVMODE structure
   Public Const CCHDEVICENAME = 32
   Public Const CCHFORMNAME = 32
   
   Public Type PRINTER_DEFAULTS
      pDatatype As String
      pDevMode As Long
      DesiredAccess As Long
   End Type
   
   Public Type DEVMODE
      dmDeviceName As String * CCHDEVICENAME
      dmSpecVersion As Integer
      dmDriverVersion As Integer
      dmSize As Integer
      dmDriverExtra As Integer
      dmFields As Long
      dmOrientation As Integer
      dmPaperSize As Integer
      dmPaperLength As Integer
      dmPaperWidth As Integer
      dmScale As Integer
      dmCopies As Integer
      dmDefaultSource As Integer
      dmPrintQuality As Integer
      dmColor As Integer
      dmDuplex As Integer
      dmYResolution As Integer
      dmTTOption As Integer
      dmCollate As Integer
      dmFormName As String * CCHFORMNAME
      dmLogPixels As Integer
      dmBitsPerPel As Long
      dmPelsWidth As Long
      dmPelsHeight As Long
      dmDisplayFlags As Long
      dmDisplayFrequency As Long
   End Type
   
   Type SYSTEMTIME
      wYear As Integer
      wMonth As Integer
      wDayOfWeek As Integer
      wDay As Integer
      wHour As Integer
      wMinute As Integer
      wSecond As Integer
      wMilliseconds As Integer
   End Type
   
   Type JOB_INFO_2
      JobId As Long
      pPrinterName As Long
      pMachineName As Long
      pUserName As Long
      pDocument As Long
      pNotifyName As Long
      pDatatype As Long
      pPrintProcessor As Long
      pParameters As Long
      pDriverName As Long
      pDevMode As Long
      pStatus As Long
      pSecurityDescriptor As Long
      Status As Long
      Priority As Long
      Position As Long
      StartTime As Long
      UntilTime As Long
      TotalPages As Long
      Size As Long
      Submitted As SYSTEMTIME
      time As Long
      PagesPrinted As Long
   End Type
   
   Type PRINTER_INFO_2
      pServerName As Long
      pPrinterName As Long
      pShareName As Long
      pPortName As Long
      pDriverName As Long
      pComment As Long
      pLocation As Long
      pDevMode As Long
      pSepFile As Long
      pPrintProcessor As Long
      pDatatype As Long
      pParameters As Long
      pSecurityDescriptor As Long
      Attributes As Long
      Priority As Long
      DefaultPriority As Long
      StartTime As Long
      UntilTime As Long
      Status As Long
      cJobs As Long
      AveragePPM As Long
   End Type
   
   Public Const ERROR_INSUFFICIENT_BUFFER = 122
   Public Const PRINTER_STATUS_BUSY = &H200
   Public Const PRINTER_STATUS_DOOR_OPEN = &H400000
   Public Const PRINTER_STATUS_ERROR = &H2
   Public Const PRINTER_STATUS_INITIALIZING = &H8000
   Public Const PRINTER_STATUS_IO_ACTIVE = &H100
   Public Const PRINTER_STATUS_MANUAL_FEED = &H20
   Public Const PRINTER_STATUS_NO_TONER = &H40000
   Public Const PRINTER_STATUS_NOT_AVAILABLE = &H1000
   Public Const PRINTER_STATUS_OFFLINE = &H80
   Public Const PRINTER_STATUS_OUT_OF_MEMORY = &H200000
   Public Const PRINTER_STATUS_OUTPUT_BIN_FULL = &H800
   Public Const PRINTER_STATUS_PAGE_PUNT = &H80000
   Public Const PRINTER_STATUS_PAPER_JAM = &H8
   Public Const PRINTER_STATUS_PAPER_OUT = &H10
   Public Const PRINTER_STATUS_PAPER_PROBLEM = &H40
   Public Const PRINTER_STATUS_PAUSED = &H1
   Public Const PRINTER_STATUS_PENDING_DELETION = &H4
   Public Const PRINTER_STATUS_PRINTING = &H400
   Public Const PRINTER_STATUS_PROCESSING = &H4000
   Public Const PRINTER_STATUS_TONER_LOW = &H20000
   Public Const PRINTER_STATUS_USER_INTERVENTION = &H100000
   Public Const PRINTER_STATUS_WAITING = &H2000
   Public Const PRINTER_STATUS_WARMING_UP = &H10000
   Public Const JOB_STATUS_PAUSED = &H1
   Public Const JOB_STATUS_ERROR = &H2
   Public Const JOB_STATUS_DELETING = &H4
   Public Const JOB_STATUS_SPOOLING = &H8
   Public Const JOB_STATUS_PRINTING = &H10
   Public Const JOB_STATUS_OFFLINE = &H20
   Public Const JOB_STATUS_PAPEROUT = &H40
   Public Const JOB_STATUS_PRINTED = &H80
   Public Const JOB_STATUS_DELETED = &H100
   Public Const JOB_STATUS_BLOCKED_DEVQ = &H200
   Public Const JOB_STATUS_USER_INTERVENTION = &H400
   Public Const JOB_STATUS_RESTART = &H800
   
   Public Function GetString(ByVal PtrStr As Long) As String
      Dim StrBuff As String * 256
      
      'Check for zero address
      If PtrStr = 0 Then
         GetString = " "
         Exit Function
      End If
      
      'Copy data from PtrStr to buffer.
      CopyMemory ByVal StrBuff, ByVal PtrStr, 256
      
      'Strip any trailing nulls from string.
      GetString = StripNulls(StrBuff)
   End Function
   
   Public Function StripNulls(OriginalStr As String) As String
      'Strip any trailing nulls from input string.
      If (InStr(OriginalStr, Chr(0)) > 0) Then
         OriginalStr = Left(OriginalStr, InStr(OriginalStr, Chr(0)) - 1)
      End If
   
      'Return modified string.
      StripNulls = OriginalStr
   End Function
   
   Public Function PtrCtoVbString(Add As Long) As String
       Dim sTemp As String * 512
       Dim x As Long
   
       x = lstrcpy(sTemp, Add)
       If (InStr(1, sTemp, Chr(0)) = 0) Then
            PtrCtoVbString = ""
       Else
            PtrCtoVbString = Left(sTemp, InStr(1, sTemp, Chr(0)) - 1)
       End If
   End Function
   
   Public Function CheckPrinterStatus(PI2Status As Long) As String
      Dim tempStr As String
      
      If PI2Status = 0 Then   ' Return "Ready"
         CheckPrinterStatus = "Printer Status = Ready" & vbCrLf
      Else
         tempStr = ""   ' Clear
         If (PI2Status And PRINTER_STATUS_BUSY) Then
            tempStr = tempStr & "Busy  "
         End If
         
         If (PI2Status And PRINTER_STATUS_DOOR_OPEN) Then
            tempStr = tempStr & "Printer Door Open  "
         End If
         
         If (PI2Status And PRINTER_STATUS_ERROR) Then
            tempStr = tempStr & "Printer Error  "
         End If
         
         If (PI2Status And PRINTER_STATUS_INITIALIZING) Then
            tempStr = tempStr & "Initializing  "
         End If
         
         If (PI2Status And PRINTER_STATUS_IO_ACTIVE) Then
            tempStr = tempStr & "I/O Active  "
         End If
   
         If (PI2Status And PRINTER_STATUS_MANUAL_FEED) Then
            tempStr = tempStr & "Manual Feed  "
         End If
         
         If (PI2Status And PRINTER_STATUS_NO_TONER) Then
            tempStr = tempStr & "No Toner  "
         End If
         
         If (PI2Status And PRINTER_STATUS_NOT_AVAILABLE) Then
            tempStr = tempStr & "Not Available  "
         End If
         
         If (PI2Status And PRINTER_STATUS_OFFLINE) Then
            tempStr = tempStr & "Off Line  "
         End If
         
         If (PI2Status And PRINTER_STATUS_OUT_OF_MEMORY) Then
            tempStr = tempStr & "Out of Memory  "
         End If
         
         If (PI2Status And PRINTER_STATUS_OUTPUT_BIN_FULL) Then
            tempStr = tempStr & "Output Bin Full  "
         End If
         
         If (PI2Status And PRINTER_STATUS_PAGE_PUNT) Then
            tempStr = tempStr & "Page Punt  "
         End If
         
         If (PI2Status And PRINTER_STATUS_PAPER_JAM) Then
            tempStr = tempStr & "Paper Jam  "
         End If
   
         If (PI2Status And PRINTER_STATUS_PAPER_OUT) Then
            tempStr = tempStr & "Paper Out  "
         End If
         
         If (PI2Status And PRINTER_STATUS_OUTPUT_BIN_FULL) Then
            tempStr = tempStr & "Output Bin Full  "
         End If
         
         If (PI2Status And PRINTER_STATUS_PAPER_PROBLEM) Then
            tempStr = tempStr & "Page Problem  "
         End If
         
         If (PI2Status And PRINTER_STATUS_PAUSED) Then
            tempStr = tempStr & "Paused  "
         End If
   
         If (PI2Status And PRINTER_STATUS_PENDING_DELETION) Then
            tempStr = tempStr & "Pending Deletion  "
         End If
         
         If (PI2Status And PRINTER_STATUS_PRINTING) Then
            tempStr = tempStr & "Printing  "
         End If
         
         If (PI2Status And PRINTER_STATUS_PROCESSING) Then
            tempStr = tempStr & "Processing  "
         End If
         
         If (PI2Status And PRINTER_STATUS_TONER_LOW) Then
            tempStr = tempStr & "Toner Low  "
         End If
   
         If (PI2Status And PRINTER_STATUS_USER_INTERVENTION) Then
            tempStr = tempStr & "User Intervention  "
         End If
         
         If (PI2Status And PRINTER_STATUS_WAITING) Then
            tempStr = tempStr & "Waiting  "
         End If
         
         If (PI2Status And PRINTER_STATUS_WARMING_UP) Then
            tempStr = tempStr & "Warming Up  "
         End If
         
         'Did you find a known status?
         If Len(tempStr) = 0 Then
            tempStr = "Unknown Status of " & PI2Status
         End If
         
         'Return the Status
         CheckPrinterStatus = "Printer Status = " & tempStr & vbCrLf
      End If
   End Function
   					

3. Menambahkan tiga CommandButton kontrol.
4. Menambahkan tiga TextBox kontrol untuk Form1, dan kemudian mengkonfigurasi TextBox kontrol sebagai berikut:
   1. Menetapkan MultiLine properti dari masing-masing TextBox kontrol untuk Benar.
   2. Ukuran setiap TextBox sekitar lima inci dan tiga inci panjang.
   3. Menetapkan ScrollBars properti dari masing-masing TextBox kontrol untuk 2 - Vertikal.
5. Tambahkan Timer mengontrol Form1.
6. Tambahkan kode berikut untuk Formulir modul:

   Option Explicit
   
   Private Sub Command1_Click()
      'Enable the timer to begin printer status checks.
      Timer1.Enabled = True
      
      'Enable and disable start and stop buttons.
      Command1.Enabled = False
      Command2.Enabled = True
      Command3.Enabled = True
   End Sub
   
   Private Sub Command2_Click()
      'Disable timer to stop further printer checks.
      Timer1.Enabled = False
      
      'Enable and disable start and stop buttons.
      Command1.Enabled = True
      Command2.Enabled = False
      Command3.Enabled = True
   End Sub
   
   Private Sub Command3_Click()
      'Clear the status info.
      Text1.Text = ""
      Text2.Text = ""
      Text3.Text = ""
   End Sub
   
   Private Sub Form_Load()
      'Initialize captions for control buttons.
      Command1.Caption = "Start"
      Command2.Caption = "Stop"
      Command3.Caption = "Clear"
      
      'Clear the status info.
      Text1.Text = ""
      Text2.Text = ""
      Text3.Text = ""
      
      Command1.Enabled = True
      'Disable stop and clear buttons.
      Command2.Enabled = False
      Command3.Enabled = False
      
      'Set interval for printer status checking to 1/2 second.
      Timer1.Enabled = False
      Timer1.Interval = 500
   End Sub
   
   Private Sub Timer1_Timer()
      Dim PrinterStatus As String
      Dim JobStatus As String
      Dim ErrorInfo As String
      
      'Clear the status info for new info/status.
      Text1.Text = ""
      Text2.Text = ""
      Text3.Text = ""
      
      'Call sub to perform check.
      Text1.Text = CheckPrinter(PrinterStatus, JobStatus)
      Text2.Text = PrinterStatus
      Text3.Text = JobStatus
   End Sub
   
   Public Function CheckPrinter(PrinterStr As String, JobStr As String) As String
      Dim hPrinter As Long
      Dim ByteBuf As Long
      Dim BytesNeeded As Long
      Dim PI2 As PRINTER_INFO_2
      Dim JI2 As JOB_INFO_2
      Dim PrinterInfo() As Byte
      Dim JobInfo() As Byte
      Dim result As Long
      Dim LastError As Long
      Dim PrinterName As String
      Dim tempStr As String
      Dim NumJI2 As Long
      Dim pDefaults As PRINTER_DEFAULTS
      Dim I As Integer
      
      'Set a default return value if no errors occur.
      CheckPrinter = "Printer info retrieved"
      
      'NOTE: You can pick a printer from the Printers Collection
      'or use the EnumPrinters() API to select a printer name.
      
      'Use the default printer of Printers collection.
      'This is typically, but not always, the system default printer.
      PrinterName = Printer.DeviceName
      
      'Set desired access security setting.
      pDefaults.DesiredAccess = PRINTER_ACCESS_USE
      
      'Call API to get a handle to the printer.
      result = OpenPrinter(PrinterName, hPrinter, pDefaults)
      If result = 0 Then
         'If an error occurred, display an error and exit sub.
         CheckPrinter = "Cannot open printer " & PrinterName & _
            ", Error: " & Err.LastDllError
         Exit Function
      End If
   
      'Init BytesNeeded
      BytesNeeded = 0
   
      'Clear the error object of any errors.
      Err.Clear
   
      'Determine the buffer size that is needed to get printer info.
      result = GetPrinter(hPrinter, 2, 0&, 0&, BytesNeeded)
      
      'Check for error calling GetPrinter.
      If Err.LastDllError <> ERROR_INSUFFICIENT_BUFFER Then
         'Display an error message, close printer, and exit sub.
         CheckPrinter = " > GetPrinter Failed on initial call! <"
         ClosePrinter hPrinter
         Exit Function
      End If
      
      'Note that in Charles Petzold's book "Programming Windows 95," he
      'states that because of a problem with GetPrinter on Windows 95 only, you 
      'must allocate a buffer as much as three times larger than the value 
      'returned by the initial call to GetPrinter. This is not done here.
      ReDim PrinterInfo(1 To BytesNeeded)
      
      ByteBuf = BytesNeeded
      
      'Call GetPrinter to get the status.
      result = GetPrinter(hPrinter, 2, PrinterInfo(1), ByteBuf, _
        BytesNeeded)
      
      'Check for errors.
      If result = 0 Then
         'Determine the error that occurred.
         LastError = Err.LastDllError()
         
         'Display error message, close printer, and exit sub.
         CheckPrinter = "Couldn't get Printer Status!  Error = " _
            & LastError
         ClosePrinter hPrinter
         Exit Function
      End If
   
      'Copy contents of printer status byte array into a
      'PRINTER_INFO_2 structure to separate the individual elements.
      CopyMemory PI2, PrinterInfo(1), Len(PI2)
      
      'Check if printer is in ready state.
      PrinterStr = CheckPrinterStatus(PI2.Status)
      
      'Add printer name, driver, and port to list.
      PrinterStr = PrinterStr & "Printer Name = " & _
        GetString(PI2.pPrinterName) & vbCrLf
      PrinterStr = PrinterStr & "Printer Driver Name = " & _
        GetString(PI2.pDriverName) & vbCrLf
      PrinterStr = PrinterStr & "Printer Port Name = " & _
        GetString(PI2.pPortName) & vbCrLf
      
      'Call API to get size of buffer that is needed.
      result = EnumJobs(hPrinter, 0&, &HFFFFFFFF, 2, ByVal 0&, 0&, _
         BytesNeeded, NumJI2)
      
      'Check if there are no current jobs, and then display appropriate message.
      If BytesNeeded = 0 Then
         JobStr = "No Print Jobs!"
      Else
         'Redim byte array to hold info about print job.
         ReDim JobInfo(0 To BytesNeeded)
         
         'Call API to get print job info.
         result = EnumJobs(hPrinter, 0&, &HFFFFFFFF, 2, JobInfo(0), _
           BytesNeeded, ByteBuf, NumJI2)
         
         'Check for errors.
         If result = 0 Then
            'Get and display error, close printer, and exit sub.
            LastError = Err.LastDllError
            CheckPrinter = " > EnumJobs Failed on second call! <  Error = " _
               & LastError
            ClosePrinter hPrinter
            Exit Function
         End If
         
         'Copy contents of print job info byte array into a
         'JOB_INFO_2 structure to separate the individual elements.
         For I = 0 To NumJI2 - 1   ' Loop through jobs and walk the buffer
             CopyMemory JI2, JobInfo(I * Len(JI2)), Len(JI2)
                
             ' List info available on Jobs.
             Debug.Print "Job ID" & vbTab & JI2.JobId
             Debug.Print "Name Of Printer" & vbTab & _
               GetString(JI2.pPrinterName)
             Debug.Print "Name Of Machine That Created Job" & vbTab & _
               GetString(JI2.pMachineName)
             Debug.Print "Print Job Owner's Name" & vbTab & _
               GetString(JI2.pUserName)
             Debug.Print "Name Of Document" & vbTab & GetString(JI2.pDocument)
             Debug.Print "Name Of User To Notify" & vbTab & _
               GetString(JI2.pNotifyName)
             Debug.Print "Type Of Data" & vbTab & GetString(JI2.pDatatype)
             Debug.Print "Print Processor" & vbTab & _
               GetString(JI2.pPrintProcessor)
             Debug.Print "Print Processor Parameters" & vbTab & _
               GetString(JI2.pParameters)
             Debug.Print "Print Driver Name" & vbTab & _
               GetString(JI2.pDriverName)
             Debug.Print "Print Job 'P' Status" & vbTab & _
               GetString(JI2.pStatus)
             Debug.Print "Print Job Status" & vbTab & JI2.Status
             Debug.Print "Print Job Priority" & vbTab & JI2.Priority
             Debug.Print "Position in Queue" & vbTab & JI2.Position
             Debug.Print "Earliest Time Job Can Be Printed" & vbTab & _
               JI2.StartTime
             Debug.Print "Latest Time Job Will Be Printed" & vbTab & _
               JI2.UntilTime
             Debug.Print "Total Pages For Entire Job" & vbTab & JI2.TotalPages
             Debug.Print "Size of Job In Bytes" & vbTab & JI2.Size
             'Because of a bug in Windows NT 3.51, the time member is not set correctly.
             'Therefore, do not use the time member on Windows NT 3.51.
             Debug.Print "Elapsed Print Time" & vbTab & JI2.time
             Debug.Print "Pages Printed So Far" & vbTab & JI2.PagesPrinted
                
             'Display basic job status info.
             JobStr = JobStr & "Job ID = " & JI2.JobId & _
                vbCrLf & "Total Pages = " & JI2.TotalPages & vbCrLf
             
             tempStr = ""   'Clear
             'Check for a ready state.
             If JI2.pStatus = 0& Then   ' If pStatus is Null, check Status.
               If JI2.Status = 0 Then
                  tempStr = tempStr & "Ready!  " & vbCrLf
               Else  'Check for the various print job states.
                  If (JI2.Status And JOB_STATUS_SPOOLING) Then
                     tempStr = tempStr & "Spooling  "
                  End If
                  
                  If (JI2.Status And JOB_STATUS_OFFLINE) Then
                     tempStr = tempStr & "Off line  "
                  End If
                  
                  If (JI2.Status And JOB_STATUS_PAUSED) Then
                     tempStr = tempStr & "Paused  "
                  End If
                  
                  If (JI2.Status And JOB_STATUS_ERROR) Then
                     tempStr = tempStr & "Error  "
                  End If
                  
                  If (JI2.Status And JOB_STATUS_PAPEROUT) Then
                     tempStr = tempStr & "Paper Out  "
                  End If
                  
                  If (JI2.Status And JOB_STATUS_PRINTING) Then
                     tempStr = tempStr & "Printing  "
                  End If
                  
                  If (JI2.Status And JOB_STATUS_USER_INTERVENTION) Then
                     tempStr = tempStr & "User Intervention Needed  "
                  End If
                  
                  If Len(tempStr) = 0 Then
                     tempStr = "Unknown Status of " & JI2.Status
                  End If
               End If
           Else
               ' Dereference pStatus.
               tempStr = PtrCtoVbString(JI2.pStatus)
           End If
             
             'Report the Job status.
             JobStr = JobStr & tempStr & vbCrLf
             Debug.Print JobStr & tempStr
         Next I
      End If
      
      'Close the printer handle.
      ClosePrinter hPrinter
   End Function
   					

7. Pergi ke antrian pencetakan Anda, dan kemudian berhenti printer. Perhatikan bahwa Anda mungkin perlu printer lokal daripada printer jaringan untuk menunda antrian pencetakan.
8. Menjalankan contoh proyek, dan kemudian klik Mulai.
9. Melakukan satu atau lebih operasi cetak dari aplikasi lain seperti Notepad. Informasi printer ditampilkan di kotak teks. Perhatikan bahwa rincian pekerjaan muncul di jendela segera.
10. Jika diperlukan, klik Stop pada form untuk menggulir melalui kotak teks dan jendela segera untuk melihat informasi printer ini.

Pemecahan Masalah

• Hanya pengandar spesifik perangkat dapat memperoleh real-time, akurat printer status informasi. Kode ini memperoleh status yang sama bahwa Windows Spooler laporan.
• Status tepat yang dilaporkan mungkin berbeda dengan printer yang berbeda dan driver.

Untuk informasi tambahan tentang bagaimana printer status dan pekerjaan pencetakan status mengatur, klik nomor artikel di bawah ini untuk melihat artikel di dalam Basis Pengetahuan Microsoft:Untuk informasi tambahan tentang cara menggunakan fungsi EnumPrinters API, klik nomor artikel di bawah ini untuk melihat artikel di dalam Basis Pengetahuan Microsoft:Untuk informasi tambahan tentang cara untuk mengambil pekerjaan pencetakan informasi di Microsoft Visual C++, klik nomor artikel di bawah ini untuk melihat artikel di dalam Basis Pengetahuan Microsoft: