To create PDF files from any music software (or any other application)
under Windows, you must install a small program beforehand.
This program can be either a freeware, like PDFCreator (recommended) or
PrimoPDF (not tested yet), a shareware, like PDF995, or a commercial
software package like the tools of the Adobe suite.
All these programs behave like a new printer for your computer.
When "printing" a document to it, a file name is asked, and the
printing result is actually saved in PDF format.
PDFCreator can be downloaded from here:
preferably the "MSI" installer).
Once downloaded and installed, when printing from any program, in the
printer selector that appears:
Select the "PDFCreator" printer then click "Print".
You'll then get a window for entering optional information about the
PDF file to be created (Title, date, author...), then a file selector
for specifying the name and location of this file.
The PDF file that matches what you asked for being printed is then
generated, and can be opened by PDFtoMusic.
You can then either send this file by e-mail to somebody else, or
process it with PDFtoMusic to convert it into the file format you need.