Chapter 5. Printers
Printing output is a major component of any database product, and
Access gives you a great deal of control over the
"look" of your forms and reports.
Programmatic control over the printer itself, however, has always
been somewhat complex in Access. Windows provides rich and intricate
support for output devices, and Access attempts to shield you from
most of that intricacy. Sometimes, however, you do need to take
control of your output devices; for example, you may need to change a
particular device or a setting pertaining to a particular device.
Historically, Access made this possible but not easy. However,
starting with Access 2002, you can use the Printers collection with a
Printer object that makes it relatively easy to accomplish the most
common printing tasks. The sections in this chapter describe the
details of handling your output devices using these new objects.
This chapter focuses on the Printers
collection and the associated Printer object. We'll
cover the properties of these objects in detail and show examples of
their use. You'll be able to retrieve a list of all
the installed printers and make a choice from that list, setting the
new default Access printer. You'll learn how to
modify margin settings in forms and reports, thereby avoiding the use
of Access's File  Page Setup dialog in
your applications. You'll get help on changing
printer options, such as the number of copies to print, the page
orientation, and the printer resolution. Then you'll
learn how to programmatically print the first page of a document from
one paper tray and the rest of the pages from a different paper tray.
This allows you to print the first page on letterhead paper and the
rest on normal paper.
Finally, you'll find out how to determine which
device has been selected to print a report and whether
it's the default device. If it is, you can change
the destination from your application, provide users with a choice of
output devices, and print the object to a particular device.
You'll also find a development tool that will run
through all your reports and let you know which
aren't set up to print to the default printer. By
ensuring that all your reports print to the default printer, you will
be able to send them to any output device simply by changing what
Access thinks is the default printer.
|
Access 2002 added functionality that fundamentally changed the ways
in which you can interact with printing devices. Previously,
determining the list of available printers and retrieving printer,
layout, and device name information from individual Access objects
was quite difficult. The code to handle these tasks in previous
versions of Access was daunting, to say the least. The difference in
the amount of code for the Access 2000 version of these examples
compared to the later Access versions is astonishing—some
examples that required several hundred lines of code in Access 2000
now require as little as 10 lines of code. To enable readers to use
these techniques in Access 2000, we've provided the
code examples in both styles. If you intend to use the examples in
Access 2000, you'll need to remove the single form
in each database that's specific to the later
versions of Access. (The code in these forms simply
won't compile in Access 2000, so the demos
won't run correctly.) The Access 2000 code is far
more complex than that for Access 2002 and later, and is the subject
for a different time and place. If you intend to use that code,
you'll need to dig seriously into the Access
documentation, or find a resource that focuses on that particular
information. We've provided the code here as a
courtesy only and can neither support nor describe it in these pages.
|
 |
