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Thread: Which one is Default Printer?

  1. #1

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    Hi!

    Does anyone know how I can check which printer is set as default? Is there an API that does it?

    I also need to find a way of closing a printer. Again, is there an API that does that?

    Thank you! Thank you!

    Olga

  2. #2
    Guru Aaron Young's Avatar
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    The Printer Object Defaults to the Default Printer when your Application Starts.

    Can you explain what you mean by Closing a Printer?

    You finish a Print by Issuing Printer.EndDoc, or Cancel the Last Page by Issuing Printer.KillDoc

    ------------------
    Aaron Young
    Analyst Programmer
    [email protected]
    [email protected]

  3. #3
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    i forgot where i got this but it works
    and you can modify it for what you need:

    This tip uses the registry to get the current printer name. Make a new project and add a form. To the form add a command button. Copy the following code into the form's General Declarations procedure:

    'Declarations
    Private Declare Function RegOpenKeyEx Lib "advapi32" Alias "RegOpenKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal dwReserved As Long, ByVal samDesired As Long, phkResult As Long) As Long
    Private Declare Function RegQueryValueEx Lib "advapi32" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName$, ByVal lpdwReserved As Long, lpdwType As Long, lpData As Any, lpcbData As Long) As Long
    Private Declare Function RegCloseKey Lib "advapi32" (ByVal hKey As Long) As Long

    Const HKEY_CURRENT_CONFIG As Long = &H80000005

    Function RegGetString$(hInKey As Long, ByVal subkey$, ByVal valname$)

    'Needed declarations
    Dim RetVal$, hSubKey As Long, dwType As Long, SZ As Long
    Dim R As Long

    RetVal$ = ""

    Const KEY_ALL_ACCESS As Long = &HF0063
    Const ERROR_SUCCESS As Long = 0
    Const REG_SZ As Long = 1

    'Open the key
    R = RegOpenKeyEx(hInKey, subkey$, 0, KEY_ALL_ACCESS, hSubKey)

    If R <> ERROR_SUCCESS Then GoTo Quit_Now

    SZ = 256: v$ = String$(SZ, 0)
    R = RegQueryValueEx(hSubKey, valname$, 0, dwType, ByVal v$, SZ)

    If R = ERROR_SUCCESS And dwType = REG_SZ Then
    RetVal$ = Left$(v$, SZ - 1)
    Else
    RetVal$ = "--Not String--"
    End If

    If hInKey = 0 Then
    R = RegCloseKey(hSubKey)
    End If

    Quit_Now:
    RegGetString$ = RetVal$
    End Function

    Private Sub Command1_Click()
    Dim GetCurrPrinter As String

    GetCurrPrinter = RegGetString$(HKEY_CURRENT_CONFIG, "System\CurrentControlSet\Control\Print\Printers", "Default")
    MsgBox GetCurrPrinter
    End Sub

  4. #4

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    Aaron,
    Here's what I need to do:
    I have several network printers attached to the computer. I need to use AcrobatPDFWriter printer. So, I need to figure out which printer is currently set as default, put it into a variable, do printing using AcrobatPDFWriter printer, and then set printer back the way it was.
    Also, when I'm done printing, the little print icon stays in my status bar with status "Paused". I need it out of there!

    Larryn,
    Thanks for your code. Unfortunately, it doesn't work for me. When I get to
    "Quit_Now:", RetVal$ is empty.

  5. #5
    Guru Aaron Young's Avatar
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    Here's a Function I wrote which will search the Printers for the specified Devicename of the Printer you want to use.
    If it's found the Function will return the Current Printer Devicename and Change to the Specified Printer.

    To Restore the Original/Default Printer, just call the Function again with the Initially returned Devicename, eg.
    Code:
    Private Sub Command1_Click()
        Dim sDefault As String
        'Select New Printer
        sDefault = SelectPrinter("Generic / Text Only")
        If Len(sDefault) Then
            'Do Print Here
            'Select Original Printer
            Call SelectPrinter(sDefault)
        Else
            'Printer Not Found
            MsgBox "Printer not Found"
        End If
    End Sub
    
    Private Function SelectPrinter(ByVal sDeviceName As String) As String
        'Enumerates the Printers looking for the specified
        'Devicename, if found, returns the Current Printer Devicename
        'Prior to changing Printers.
        Dim oPRN As Printer
        For Each oPRN In Printers
            If oPRN.DeviceName = sDeviceName Then
                SelectPrinter = Printer.DeviceName
                Set Printer = oPRN
                Exit For
            End If
        Next
    End Function

    ------------------
    Aaron Young
    Analyst Programmer
    [email protected]
    [email protected]

  6. #6
    PowerPoster Keithuk's Avatar
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    Re: Which one is Default Printer?

    Quote Originally Posted by ;7591

    If R <> ERROR_SUCCESS Then GoTo Quit_Now
    What is this supposed to be?



    Private Sub Command1_Click()
    Dim GetCurrPrinter As String

    GetCurrPrinter = RegGetString$(HKEY_CURRENT_CONFIG, "System\CurrentControlSet\Control\Print\Printers", "Default")
    MsgBox GetCurrPrinter
    End Sub
    I know this is an old post but I've been after the default printer from the registry for a long time. I've searched on here but I haven't found the answer. The above code has errors he obviously doesn't use Option Explicit.

    That registry path will find the printer on a Win9x/ME system I've used it for years but it won't find it on a WinNT system.

    I know MsgBox Printer.DeviceName will give the printer and computer but I just need the printer name.

    Can anyone help me find the default printer on a WinNT system?

    As well as the printer I need the graphics/video card from the registry as well. The registry remembers all graphics cards that have been fitted. I changed the card on my old computer and the old card and new card were both in there.
    Keith

    I've been programming with VB for 25 years. Started with VB4 16bit Pro, VB5 Pro, VB6 Pro/Enterprise and now VB3 Pro. But I'm no expert, I'm still learning.

  7. #7
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    Re: Which one is Default Printer?

    getdefaultprinter API
    works for w2000 xp
    does not work for 9x

    or if you really want to do in registry
    HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows\device

    WMI could be a good option for video card
    Last edited by westconn1; Sep 3rd, 2010 at 05:16 AM.
    i do my best to test code works before i post it, but sometimes am unable to do so for some reason, and usually say so if this is the case.
    Note code snippets posted are just that and do not include error handling that is required in real world applications, but avoid On Error Resume Next

    dim all variables as required as often i have done so elsewhere in my code but only posted the relevant part

    come back and mark your original post as resolved if your problem is fixed
    pete

  8. #8
    PowerPoster Keithuk's Avatar
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    Re: Which one is Default Printer?

    Quote Originally Posted by westconn1 View Post
    WMI could be a good option for video card
    Cheers westconn but WMI doesn't work on Win9x/ME. With Win9x/ME you can normally get it from the system.ini but sometimes it isn't always true.
    Keith

    I've been programming with VB for 25 years. Started with VB4 16bit Pro, VB5 Pro, VB6 Pro/Enterprise and now VB3 Pro. But I'm no expert, I'm still learning.

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