Intermec 6200 Reference Guide

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Forward.  Advances the paper a certain number of lines.  Use this option

with caution because Windows is not aware of the paper movement.  (See

the Special Paper Handling paragraph.)  Set the following:

"

wOpt 

to 

PRT_FORWARD(0x0030)

"

lParam1

 to the number of lines to advance

"

lParam2

 to 0

"

Rewind.  Rewinds the paper back into the printer a certain number of lines.

Use this option with caution because Windows is not aware of the paper

movement.  It may also cause a head jam. (See the Special Paper Handling

paragraph on the next page.)  Set the following:

"

wOpt

 to 

PRT_REVERSE(0x0040)

"

lParam1

 to the number of lines to advance

"

lParam2

 to 0

The PrtService API supports two paperĆhandling options to be used with care:

PRT_FORWARD and PRT_REVERSE.  They allow reports to be voided" after

they are printed and inspected.  Windows maintains an internal value that

knows" where the current page is relative to the top of form and end of form.  If

you use these options, Windows can get confused.
The printer also knows where it is on the page (every 11 inches is a new page);

and it may not match the actual paper, if the topĆofĆform button is used

incorrectly.  Windows always does a form feed at the end of a page to advance the

paper to the top of the next page.  These options are typically used around the

printers topĆofĆform marker, which confuses things even more.  Different sizes of

paper behave differently and may jam the printer.
The following describes a scenario that works in most cases.  Other options need

to be done on a trialĆandĆerror basis:

1. Generate your entire page (may be only half of the page) and call

EndPage(...)

.  

EndPage(...)

 

flushes everything printed to the printer and

performs a form feed.  This puts you at the top of the next page.

2. Call 

StartPage(...)

 to reset the Windows device context to do more

output.

3. Use PRT_FORWARD to advance the paper far enough so that the user can

determine whether the page is correct.  Use a small number of lines, if you

can, especially if you are using multipart forms.  If possible, do not advance

at all.  This may be possible if you have not printed on the bottom inch of

the page or if the information is not critical.  In any case, use

PRT_REVERSE to rewind the paper exactly the same number of lines (see

step 6).

4. Have your application ask the user to determine whether the page is

correct.

5. Use PRT_REVERSE to rewind the paper back into the printer the same

number of lines that you used in step 3.  This takes you to the top of the

form.  Skip this step if step 3 did not move the paper.

6. Use PRT_REVERSE to rewind the paper back into the printer far enough

to get to the spot at which you want to print your validation information.

Make sure that you rewind past the topĆofĆform marker so that the

EndPage(...)

 in step 7 goes to the top of the next page.  If not,

EndPage(...)

 

skips an entire page.  To print on the last line of the page,

use the value of 2, assuming 

TextOut(...)

 starts at 0 for the Y value.