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I have the same problem. II have DOS BOS Megabuild, I started to use DOS application and there is a problem with printing. I have Win7 32-bit and I'm wondering why I can't print, I get the same config:

, and nothing happens..

[printer]
printer=true
dpi=360
width=85
height=110
##printoutput=png
printoutput=printer
##multipage=false
multipage=true
docpath=.
timeout=0

[parallel]
##parallel1=disabled
##parallel1=printer
parallel1=reallpt directlpt:378
parallel2=disabled
##parallel2=reallpt directlpt:BC00
parallel3=disabled

I have virtual printer and from dos box it doesn't work. So i started changing config but still nothig ;(

here's what I did to print from DOSBox:

- Installed DOSBox Megabuild (D/L from http://home.arcor.de/h-a-l-9000)
- Settings in dosbox.conf:

CODE: SELECT ALL
[printer]
printer=true
dpi=360
width=85
height=110
printoutput=printer
multipage=false
docpath=.
timeout=1000

[parallel]
parallel1=printer


With these settings a window will pop up asking you to select a printer. Works without problems here (Windows 7 Pro x64).

You can use one of the patched/forked versions of DOSBox that support printing. There are a few.

One I've recently started using is Taewoong's enhanced "ykhwong" version (as of writing, it was last updated Oct. 12. 2011):

Included Patches:

Direct3D with pixelshaders, OpenglHQ, Innovation, Glide, zip/7z mount, Beep, NE2000 Ethernet, Graphis user interface (menu), Save/Load states, Vertical sync, CPU flags optimization, Various DOS commands (PROMPT VOL, LABEL, MOUSE, etc) and CONFIG.SYS commands (DEVICE, BUFFERS, FILES, etc), Continuous turbo key, Core-switch key, Show details (from menu bar), Nice DOSBox icon, Font patch (cp437), MAKEIMG command, INTRO, Ctrl-break patch, DBCS support patch, Automatic mount, Printer output, MT-32 emulation (MUNT), MP3CUE, Overscan border, Stereo-swap, SDL_Resize, MemSize128, Internal 3dfx voodoo chip emulation, Amstrad & PS/1 sound emulation, Fluidsynth soundfont support, Timidity++ backend support, CGA w/ Monochrome Monitor Support, Improve PC Speaker emulation accuracy patch, etc.
It allows redirecting LPT1 (through LPT3) to an actual LPT port, a printer file (.prn), or to the virtual printer. The valid options in the Parallel/Dongle dialog are reallpt, printer, file and disabled.

If you set it up to send to the virtual printer, it can "print" to a graphic file (.PNG, .BMP, .PS), or to a Windows printer on the host (it pops up Windows a print dialog):

DOSBOX MegaBuild from here : http://home.arcor.de/h-a-l-9000


edit config file DOSBOX Megabuild like this

#parallel1=file append:C:\Users\user\filename.txt
change to
parallel1=file dev:lpt1


port capturing
net use LPT1: \\computer-name\printer /persistent:yes

And you can print on USB Printer in Windows 7 64bit (and any other I think - withou any printfil programs)
Work like hell for me.

Good luck.

How do I configure Printfil to capture DosBox print jobs ?

DOSBOX is a DOS emulator, freely available at http://www.dosbox.com - Some Customers do use it to run their DOS programs; mainly on 64 bit Windows systems (that cannot run 16 bit software, like DOS, natively).
If instead you're using the vDos DOSBox variant, please see the faq: How to print from vDos.

How to configure Printfil to capture DOS print jobs run inside DosBox depends mainly by how the DOS program itself produces those jobs:

The DOS program "prints to file" itself.
The DOS program prints to a parallel port (LPT1: , LPT2: , LPT3:) or a serial port (COM1: , COM2: , COM3: , COM4:)
1) The DOS program "prints to file" itself

In this case you just have to point Printfil to the very same file name produced by the DOS program.

You can do it by inserting that file name in the "File to check" field at Configuration -> Standard
There's no need to select any COM Port or LPT port to capture in that configuration dialog.

As soon as the DOS program finishes printing, Printfil will capture the job-file and will show it on screen, if Preview is enabled at Configuration -> Standard, or will directly send it to the choosen Windows printer.

2) The DOS program prints to parallel ports (LPT1:, LPT2:, LPT3:) or serial ports (COM1:, COM2:, COM3:, COM4:)

In this case please note that the Standard DosBox build available at the link above does NOT support parallel port emulation, so, print jobs sent by a DOS program to (say) LPT1: in DosBox simply "disappears" and Printfil receives nothing to capture, even if you've selected the LPT1: port at Configuration -> Standard .

There are however special DosBox builds (DosBox SVN Daum and DosBox MegaBuild) that DO support parallel port emulation

NEW: You can use the free DosPrint program that checks your PC configuration, then downloads, installs and configures both the right DosBox emulator and Printfil without having to do those tasks manually. DosPrint is available for free at https://www.DosPrint.com
If instead you already have DOSBox up and running on your machine, the newer Printfil version automatically detects if DosBox SVN Daum or DosBox MegaBuild is installed on your Windows machine when selecting a LPT port to capture at Configuration -> Standard and asks you if you want to automatically configure DosBox to capture the selected COM port or LPT port.

So, in order to capture print jobs sent to the LPT1: , LPT2: , LPT3: , COM1: , COM2: , COM3: or COM4: port by a DOS program within DosBox you just have to:

If it's a parallel port, install DosBox SVN Daum (http://ykhwong.x-y.net) or DosBox MegaBuild (http://home.arcor.de/h-a-l-9000)
If you're using a previous Printfil version, upgrade your Printfil copy
Go to Configuration -> Standard and select the LPT port or COM port you want to capture