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Private Declare Function OpenPrinter Lib "winspool.drv" Alias "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, pDefault As Any) As Long
Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long
Private 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 Any, ByVal cdBuf As Long, pcbNeeded As Long, pcReturned As Long) As Long

Private Sub Form_Load()
    Dim hPrinter As Long, lNeeded As Long, lReturned As Long
    Dim lJobCount As Long
    OpenPrinter Printer.DeviceName, hPrinter, ByVal 0&
    EnumJobs hPrinter, 0, 99, 1, ByVal 0&, 0, lNeeded, lReturned
    If lNeeded > 0 Then
        ReDim byteJobsBuffer(lNeeded - 1) As Byte
        EnumJobs hPrinter, 0, 99, 1, byteJobsBuffer(0), lNeeded, lNeeded, lReturned
        If lReturned > 0 Then
            lJobCount = lReturned
        Else
            lJobCount = 0
        End If
    Else
        lJobCount = 0
    End If
    ClosePrinter hPrinter
    MsgBox "Jobs in printer queue: " + CStr(lJobCount), vbInformation
End Sub