Printer problem with linefeeds at beginning, slightly solved

at first I want to thank you answering my last problems.
I think it's a device driver problem or a windows problem (tried W2k, WinXP,
Editor, Wordpad, all the same). There seems to be bad data in the buffer
when each print job starts, also after cold booting the pc and printer - so
there's always bad data before printing.

My question: Is it possible to erase the contents of the printer buffer? I
think this could solve my problem. How can I erase the buffer?

Thanks for your help,

guidof73 (128)
12/14/2006 2:36:58 PM
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I have an ESC command of the printer to initialize it: ESC @
But I don't know how to send it to the printer, since I use MS Visual
C++.NET 2003 with TextOut(...,"Hello printer").
In the manual there is a description with BASIC commands:
10 LPRINT CHR$(27); "@";

How to be solved in C++?

guidof73 (128)
12/14/2006 4:18:59 PM
You have to use the "Escape" mechanism to send things directly to the printer.  I haven't
used this in many, many years.

Note that TextOut has very little to do with writing to the printer; that's just some
weird side effect that happens eventually.  At the simplest level, think of TextOut as
drawing to a bitmap that will be sent to the printer, not as something that is actually
writing text to the printer.  The Escape method, however, sends raw bytes to the output

Most dot-matrix printers can't print anything that Windows can create, so what the print
spooler does is take a metafile and call on the printer driver to convert the metafile to
a bitmap at the time of transmission.  Some printer drivers just draw the bitmap directly
to the spooler file which then transmits the bitmap down.

In terms of how Escape works with your printer, you have to understand that TextOut does
NOT write text to your printer; it writes it indirectly, and some other independent,
asynchronous transport mechanism delivers it to your printer.  If you really want to write
raw text to your printer using the printer control codes, open device LPT: and do

Similarly, examples done in DOS Basic on how to use the printer are somewhere between
irrelevant and misleading nearly all the time.  Your printer driver is supposed to deal
with these issues.  Now, if you were opening the raw printer as device LPT: and doing
WriteFile operations to it, then indeed you might need to send this initialize sequence.
But when printing with Windows, do you have any evidence that it is required?  If it
isn't, then ignore the problem.  If it is, then the driver is supposed to supply it.
That's assuming you have the right driver installed for your printer.

You can use the PASSTHROUGH option if the Escape feature is supported (there's another
option to query if the Escape feature is supported for your printer), otherwise you need
to think about what you are printing, how, and why.

On Thu, 14 Dec 2006 17:18:59 +0100, "Guido Franzke" <> wrote:

>I have an ESC command of the printer to initialize it: ESC @
>But I don't know how to send it to the printer, since I use MS Visual
>C++.NET 2003 with TextOut(...,"Hello printer").
>In the manual there is a description with BASIC commands:
>10 LPRINT CHR$(27); "@";
>How to be solved in C++?
Joseph M. Newcomer [MVP]
MVP Tips:
newcomer (15974)
12/14/2006 7:49:42 PM

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