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Hi Bdp2000:

You were right, in your sample don't appear error screen.-
What i was looking is to print silently and i solved it this way:

EXECUTE FILE 'SumatraPDF.EXE' PARAMETERS '-print-to-default -plugin -exit-on-print ' + cHwnd + ' ' + 'SAMPLE.pdf'

The issue i got was because i put parameter "-plugin" as the first.- Put it in the middle works find.-

By the way, i test different printScale, and the best result was putting "none".- With this parameter (none) PDF document is printed exactly with the paper size (margins) it was created.- Take in count that if on your app will be printed different format of pages, printer must be set to "legal" size.- In other terms is the as if you choose on Adobe Reader the option Select paper size from document (pdf) size.

Just a contribution.-
With regards.
Eduardo

Several functions to support SumatraPDF and simple pdf viewer.
May be useful to someone.

Excellent work, Krzysztof !
Very impressed by your quality.
Indeed to say: it was expected in your source codes.

Your events procedure is very good.
A good mastery in this area is fundamental to be a high quality work.

May I offer my little tip ? Or to give my opinion regarding GRID Files:

We would change ONDBLCLICK by ONCHANGE.

F12 other HotKeys, very useful.

Thank you very much for your sharing.

This is going to my favorites in my collection sources.

Excellent and well done. Thanks forma share with al.
Thanls Kristof. With regards. Eduardo

Pablo César wrote: ↑Wed Mar 22, 2017 9:38 pm Excellent work, Krzysztof !
Very impressed by your quality.
Indeed to say: it was expected in your source codes.

Your events procedure is very good.
A good mastery in this area is fundamental to be a high quality work.

May I offer my little tip ? Or to give my opinion regarding GRID Files:

We would change ONDBLCLICK by ONCHANGE.

F12 other HotKeys, very useful.

Thank you very much for your sharing.

This is going to my favorites in my collection sources.

+1

Wow!
Thanks Krzysztof for your very useful code.

Excellent work. Many thanks Krzysztof.
Said from Algeria

Very usefull. Thanks.

Dzięki Krzysztofie!
There is a small bug:
Open any PDF file, then set focus to "SumatraPanel" (press Tab key or click on SumatraPanel), then press left Alt key. The program will freeze.

Edward.

Great job! Thank you Krzysztof!
My first run hangs up application, too.
But, after reset computer, it worked OK.