Hi All,

Is there a system call that will return a list
of all the printers or should I just read the
registry?

Many thanks,
-T

On Sun, 27 Jun 2021 23:03:29 -0700, T wrote:
> Hi All,
>
> Is there a system call that will return a list
> of all the printers or should I just read the
> registry?
>
> Many thanks,
> -T

Printer API has it.

On 6/28/21 4:26 AM, JJ wrote:
> On Sun, 27 Jun 2021 23:03:29 -0700, T wrote:
>> Hi All,
>>
>> Is there a system call that will return a list
>> of all the printers or should I just read the
>> registry?
>>
>> Many thanks,
>> -T
>
> Printer API has it.
>

This one?

https://docs.microsoft.com/en-us/windows/win32/printdocs/enumprinters

T,

> This one?
>
> https://docs.microsoft.com/en-us/windows/win32/printdocs/enumprinters

Thats one of them. It could not hurt to take a peek at the other functions
in that group ("see also", "Print Spooler API Functions") though.

Depending on what exactly you are looking for - all currently usable
printers, or just a list of possible ones (with drivers installed for them)
or something other - the function(s) you need might differ.

Regards,
Rudy Wieser

On 6/28/21 1:22 PM, R.Wieser wrote:
> T,
>
>> This one?
>>
>> https://docs.microsoft.com/en-us/windows/win32/printdocs/enumprinters
>
> Thats one of them. It could not hurt to take a peek at the other functions
> in that group ("see also", "Print Spooler API Functions") though.
>
> Depending on what exactly you are looking for - all currently usable
> printers, or just a list of possible ones (with drivers installed for them)
> or something other - the function(s) you need might differ.
>
> Regards,
> Rudy Wieser
>
>

Hi Rudy,

Under Windows 10, I have found the Devices and Printers
does not always list all the printers -- very frustrating
at times.

I find the missing printers by going into any program
with a print dialog and finding them in the pull down.

So I wanted to write a program that would give me a
quick list of printers, so I can see what is missing
from Devices and Printers.

This is what I wrote for Linux:

$ ListPrinters.pl6
nCount <5>
$i = <0> printer: <B4350>
$i = <1> printer: <Cups-PDF>
$i = <2> printer: <Cups_PDF_rn6>
$i = <3> printer: <Oki_B4350_on_dev_lp0_rn6>
$i = <4> printer: <Virtual_PDF_Printer>

I wanted to add an OS check to the above program
so it would give me Windows as well as Linux
printers.

-T

T,

> Under Windows 10, I have found the Devices and Printers
> does not always list all the printers -- very frustrating
> at times.
>
> I find the missing printers by going into any program
> with a print dialog and finding them in the pull down.

Thats pretty-much what I'm talking about : the first might be showing the
physical printers you can actually print to and the second a list of
/possible/ printers.

Alas, I've got no idea which of the functions returns which group though.

Regards,
Rudy Wieser

On 6/29/21 1:14 AM, R.Wieser wrote:
> T,
>
>> Under Windows 10, I have found the Devices and Printers
>> does not always list all the printers -- very frustrating
>> at times.
>>
>> I find the missing printers by going into any program
>> with a print dialog and finding them in the pull down.
>
> Thats pretty-much what I'm talking about : the first might be showing the
> physical printers you can actually print to and the second a list of
> /possible/ printers.
>
> Alas, I've got no idea which of the functions returns which group though.
>
> Regards,
> Rudy Wieser
>
>

but, but, but ...

T,

> but, but, but ...

:-)

Something I would try is to see if I could, from such "any program with a
print dialog" list all the functions from DLLs it uses, filter out the ones
in the "spool" DLL, and see if I could figure out which one is the dialog
showing those "missing printers" - and from there see if MSDN has some more
info on what it actually does (where it gets it printers from).

Regards,
Rudy Wieser

On Mon, 28 Jun 2021 14:01:19 -0700, T wrote:
>
> I wanted to add an OS check to the above program
> so it would give me Windows as well as Linux
> printers.

Linux printers must be made recognizable and accessible by Windows systems
from the Linux itself, either as SMB shares, UPnP devices, or Internet
Printers.

On 6/29/21 2:07 PM, JJ wrote:
> On Mon, 28 Jun 2021 14:01:19 -0700, T wrote:
>>
>> I wanted to add an OS check to the above program
>> so it would give me Windows as well as Linux
>> printers.
>
> Linux printers must be made recognizable and accessible by Windows systems
> from the Linux itself, either as SMB shares, UPnP devices, or Internet
> Printers.
>

CUPS (Common Unix Printing System) is pretty good
at find everything, including your surroundings.

Now I want to add Windows support to my program
as well

On 6/27/21 11:03 PM, T wrote:
> Hi All,
>
> Is there a system call that will return a list
> of all the printers or should I just read the
> registry?
>
> Many thanks,
> -T

Found it!

https://docs.microsoft.com/en-us/dotnet/api/system.drawing.printing.printersettings.installedprinters?redirectedfrom=MSDN&view=net-5.0#System_Drawing_Printing_PrinterSettings_InstalledPrinters

T,

> Found it!
>
> https://docs.microsoft.com/en-us/dotnet/api/system.drawing.printing.printersettings.installedprinters?redirectedfrom=MSDN&view=net-5.0#System_Drawing_Printing_PrinterSettings_InstalledPrinters

I hope you do realize that is .NET specific/dependant ...

I'm fairly sure you can get the same results using the "spool" group of
(simple) functions though.

Regards,
Rudy Wieser

On 6/30/21 5:09 AM, R.Wieser wrote:
> T,
>
>> Found it!
>>
>> https://docs.microsoft.com/en-us/dotnet/api/system.drawing.printing.printersettings.installedprinters?redirectedfrom=MSDN&view=net-5.0#System_Drawing_Printing_PrinterSettings_InstalledPrinters
>
> I hope you do realize that is .NET specific/dependant ...
>
> I'm fairly sure you can get the same results using the "spool" group of
> (simple) functions though.
>
> Regards,
> Rudy Wieser
>
>

Missed that. Damn.