🚀 go-pugleaf

Hi,

I'm new at Windows driver development and I am trying to develop a Virtual
Printer driver which must produce a bitmap file.  My driver must do the
following:

A user prints to the virtual printer from any possible Windows application.
When a user gives the command to print:  A dialog box must appear.  These
dialog box gives the user the opportunity to select a bmp file, color
settings, quality (DPI), etc, ...  Afterwards the BMP will be produced.

I would like to change each scanline received in pBuf in the following
function: FilterGraphics.  The reason why I need this is because I would
like to add a tag at the beginning of the scanline and at the end.  I will
use these tags to recognize each scanline in the portmonitor so I can write
these scanlines to a file without printercommands(PCL/POSTSCRIPT).  The
portmonitor produces the BMP file.

STDMETHOD
  (FilterGraphics) (
    THIS_
    PDEVOBJ pdevobj,
    PBYTE pBuf,
    DWORD dwLen
    )PURE;

Occording to me I think I need the following components:

A modified version of OEMUNI.DLL (this component must modify the scanlines
in FilterGraphics)
A modified version of LOCALMON (this component must write the BMP to a file)
A modified version of LOCALUI (this component must display a dialog box).