[vb] intercettare stampe

[uMoR]

devo fare un codicino che mi intercetta le stampe effettuate e in particolar modo il numero dei fogli stampati..
come posso fare ?

[tas]

Ma dentro ad un particolare software oppure quando lanci una stampa da una qualsiasi applicazione?

Nel primo caso basta analizzare la struttura DEVMODE. Ti riporto un pezzo di codice di una library che ho scritto per le mia applicazioni:

Dim lppd As PRINTDLG
Dim dm As DEVMODE
Dim lpdm As Long
Dim ret As Long
Dim copies As Integer

lppd.Flags = PD_RETURNDEFAULT Or PD_RETURNDC
lppd.lStructSize = Len(lppd)

ret = api_PrintDlg(lppd)
m_hdevmode = lppd.hDevMode

lpdm = api_GlobalLock(m_hdevmode)
api_CopyMemory dm, lpdm, Len(dm)
api_GlobalUnlock m_hdevmode

copies = dm.dmCopies

PRINTDLG, DEVMODE, i flags, PrintDlg, GlobalLock, CopyMemory, GlobalUnlock li trovi nel visualizzatore API di VB6.


Se invece devi intercettare questo dato per tutte le applicazioni, presumo sia necessario attivare un hook al sistema, ma non ho la più pallida idea di come fare.

[uMoR]

per tutte le applicazioni

[matpez]

Mi sa che ci vuole un hook allo spoiler di stampa, cosi in qlk modo riusciresti a leggere il numero di documenti in coda i sapere il numero...solo che nn ho la + pallida idea di come si faccia

[matpez]

Guarda questo codice, ora è un po' presto al mattimo (5.50) per mettermi a ragionare, ma cmq dai parametri nn sembra male:

Private Const CCHDEVICENAME = 32
Private Const CCHFORMNAME = 32

Private 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
    dmUnusedPadding As Integer
    dmBitsPerPel As Integer
    dmPelsWidth As Long
    dmPelsHeight As Long
    dmDisplayFlags As Long
    dmDisplayFrequency As Long
End Type

Private Type PRINTER_INFO_2
   pServerName As String
   pPrinterName As String
   pShareName As String
   pPortName As String
   pDriverName As String
   pComment As String
   pLocation As String
   pDevMode As Long
   pSepFile As String
   pPrintProcessor As String
   pDatatype As String
   pParameters As String
   pSecurityDescriptor As Long
   Attributes As Long
   Priority As Long
   DefaultPriority As Long
   StartTime As Long
   UntilTime As Long
   Status As Long
   JobsCount As Long
   AveragePPM As Long
End Type

Private Type PRINTER_DEFAULTS
  pDatatype As String
  pDevMode As DEVMODE
  DesiredAccess As Long
End Type

Public Enum Printer_Status
   PRINTER_STATUS_READY = &H0
   PRINTER_STATUS_PAUSED = &H1
   PRINTER_STATUS_ERROR = &H2
   PRINTER_STATUS_PENDING_DELETION = &H4
   PRINTER_STATUS_PAPER_JAM = &H8
   PRINTER_STATUS_PAPER_OUT = &H10
   PRINTER_STATUS_MANUAL_FEED = &H20
   PRINTER_STATUS_PAPER_PROBLEM = &H40
   PRINTER_STATUS_OFFLINE = &H80
   PRINTER_STATUS_IO_ACTIVE = &H100
   PRINTER_STATUS_BUSY = &H200
   PRINTER_STATUS_PRINTING = &H400
   PRINTER_STATUS_OUTPUT_BIN_FULL = &H800
   PRINTER_STATUS_NOT_AVAILABLE = &H1000
   PRINTER_STATUS_WAITING = &H2000
   PRINTER_STATUS_PROCESSING = &H4000
   PRINTER_STATUS_INITIALIZING = &H8000
   PRINTER_STATUS_WARMING_UP = &H10000
   PRINTER_STATUS_TONER_LOW = &H20000
   PRINTER_STATUS_NO_TONER = &H40000
   PRINTER_STATUS_PAGE_PUNT = &H80000
   PRINTER_STATUS_USER_INTERVENTION = &H100000
   PRINTER_STATUS_OUT_OF_MEMORY = &H200000
   PRINTER_STATUS_DOOR_OPEN = &H400000
   PRINTER_STATUS_SERVER_UNKNOWN = &H800000
   PRINTER_STATUS_POWER_SAVE = &H1000000
End Enum

Private Declare Function OpenPrinter Lib "winspool.drv" Alias "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, pDefault As PRINTER_DEFAULTS) As Long
Private Declare Function GetPrinter Lib "winspool.drv" Alias "GetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, buffer As Long, ByVal pbSize As Long, pbSizeNeeded As Long) As Long
Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Private Declare Function IsBadStringPtrByLong Lib "kernel32" Alias "IsBadStringPtrA" (ByVal lpsz As Long, ByVal ucchMax As Long) As Long

Public Function StringFromPointer(lpString As Long, lMaxLength As Long) As String
    Dim sRet As String
    Dim lret As Long
    If lpString = 0 Then
        StringFromPointer = ""
        Exit Function
    End If
    If IsBadStringPtrByLong(lpString, lMaxLength) Then
        ' An error has occured - do not attempt to use this pointer
        StringFromPointer = ""
        Exit Function
    End If
    ' Pre-initialise the return string...
    sRet = Space$(lMaxLength)
    CopyMemory ByVal sRet, ByVal lpString, ByVal Len(sRet)
    If Err.LastDllError = 0 Then
        If InStr(sRet, Chr$(0)) > 0 Then
            sRet = Left$(sRet, InStr(sRet, Chr$(0)) - 1)
        End If
    End If
    StringFromPointer = sRet
End Function

Private Sub Form_Load()
    Dim SizeNeeded As Long, buffer() As Long
    Dim pDef As PRINTER_DEFAULTS
    'Get a handle to the printer
    lret = OpenPrinter(Printer.DeviceName, mhPrinter, pDef)
    'Initialize the buffer
    ReDim Preserve buffer(0 To 0) As Long
    'Retrieve the required size (in bytes)
    lret = GetPrinter(mhPrinter, 2, buffer(0), UBound(buffer), SizeNeeded)
    'Resize the buffer... Note that a Long is four bytes
    ReDim Preserve buffer(0 To (SizeNeeded / 4) + 3) As Long
    'Retrieve the Printer information
    lret = GetPrinter(mhPrinter, 2, buffer(0), UBound(buffer) * 4, SizeNeeded)
    'The data stored in 'buffer' corresponds with the data of a PRINTER_INFO_2 structure
    ClosePrinter mhPrinter
    'Show the data
    PrintData "Server name", StringFromPointer(buffer(0), 255)
    PrintData "Printer name", StringFromPointer(buffer(1), 255)
    PrintData "Share name", StringFromPointer(buffer(2), 255)
    PrintData "Port name", StringFromPointer(buffer(3), 255)
    PrintData "Driver name", StringFromPointer(buffer(4), 255)
    PrintData "Comment", StringFromPointer(buffer(5), 255)
    PrintData "Location", StringFromPointer(buffer(6), 255)
    'Unload Me
End Sub

Sub PrintData(Name As String, Data As String)
    If LenB(Data) > 0 Then
        Debug.Print Name + ": " + Data
    End If
End Sub

Questo codice controllo lo stato della stampante con un foglio in stampa, perchè l'ho provato alla svelta ma nn dava in unscita nulla...oppure sono troppo rincoglionito e devo andare a nanna e pensarci dopo il riposo!!

Ciaooooooooooooooooooooooooo

[uMoR]

uhm... io non sono riuscito a farci nulla tranne che avere il nome della stampante

[uMoR]

altre idee ?