by Rachel D Kozlowski (1 Submission)
Category: Miscellaneous
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Tue 1st October 2002
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Prints real-time line by line. Does not spool and waste paper. Put code that is in form load into any subroutine and it should work fine. Just
API Declarations
Dim sWrittenData As String
VBcoders
'The problem with the Printer object Printer.print is that it spools all
'the data until
'the buffer is filled and then prints. If you want to print realtime and do
'not want to waste paper this program prints and clears the buffer by opening
'the printer object, printing and then closing the object.
'The code in form load can be called in any subroutine. It was put into form
'load for demonstration purposes only.
Private Type DOCINFO
pDocName As String
pOutputFile As String
pDatatype As String
End Type
Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal _
hPrinter As Long) As Long
Private Declare Function EndDocPrinter Lib "winspool.drv" (ByVal _
hPrinter As Long) As Long
Private Declare Function EndPagePrinter Lib "winspool.drv" (ByVal _
hPrinter As Long) As Long
Private Declare Function OpenPrinter Lib "winspool.drv" Alias _
"OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, _
ByVal pDefault As Long) As Long
Private Declare Function StartDocPrinter Lib "winspool.drv" Alias _
"StartDocPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, _
pDocInfo As DOCINFO) As Long
Private Declare Function StartPagePrinter Lib "winspool.drv" (ByVal _
hPrinter As Long) As Long
Private Declare Function WritePrinter Lib "winspool.drv" (ByVal _
hPrinter As Long, pBuf As Any, ByVal cdBuf As Long, _
pcWritten As Long) As Long
Private Sub Form_Load()
'Setting printer properties for report
Printer.ScaleMode = vbInches
Printer.FontSize = 12
Printer.FontName = "Arial"
'The code below can be placed in any subroutine to be called, you do not have
'to put it in form load.
sWrittenData = "Hi there!"
Call PrintNow(sWrittenData)
End Sub
Private Sub PrintNow(sWrittenData As String)
Dim lhPrinter As Long
Dim lReturn As Long
Dim lpcWritten As Long
Dim lDoc As Long
Dim MyDocInfo As DOCINFO
lReturn = OpenPrinter(Printer.DeviceName, lhPrinter, 0)
If lReturn = 0 Then
MsgBox "The Printer Name you typed wasn't recognized."
Exit Sub
End If
MyDocInfo.pDocName = "Document 1"
MyDocInfo.pOutputFile = vbNullString
MyDocInfo.pDatatype = vbNullString
lDoc = StartDocPrinter(lhPrinter, 1, MyDocInfo)
Call StartPagePrinter(lhPrinter)
sWrittenData = sWrittenData & vbCrLf
lReturn = WritePrinter(lhPrinter, ByVal sWrittenData, _
Len(sWrittenData), lpcWritten)
lReturn = EndPagePrinter(lhPrinter)
lReturn = EndDocPrinter(lhPrinter)
lReturn = ClosePrinter(lhPrinter)
End Sub
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