i have a serious problem with CreateNamedPipe:

 

I am developing a virtual printer driver in VISTA, for that at one

point i use NamedPipe ok..

 

 

Now if my all code is run good then there is no any problem becuse at

the end of printing job i disconnect this named pipe and close this

handle.

 

 

Now consider the case that my NamedPipe is created and without close

it my printer driver crash at some point means when ever second time

any print job is there it does not createNamePipe gives me error

ERROR_ALREADY_EXISTS that "Cannot create a file when that file

already

exists".

 

 

here i write my code for create named pipe

 

 

hBitmapPrinterPipe = CreateNamedPipe( L"\\\\.\\Pipe\

\BitmapPrinterPipe", // pipe name

PIPE_ACCESS_DUPLEX|

FILE_FLAG_OVERLAPPED,

PIPE_TYPE_BYTE

|

PIPE_WAIT,

 

 

PIPE_UNLIMITED_INSTANCES,

MAX_PATH,

MAX_PATH,

NMPWAIT_USE_DEFAULT_WAIT,

NULL)

 

 

if(hBitmapPrinterPipe == INVALID_HANDLE_VALUE) {

GetLastError())

}

 

 

Using this code i create my pipe..

 

 

so my question is there is any method from which i can reopen my

existing server pipe and close it..

OR there is any solution from which i can open the another instance

of

the same name pipe..

so please write me which solution is best for me and how can i do

it..

 

 

Thanks in advance..

A bit specialised for this generalist group. You may get some kind soul will

be willing to plough through your code, but you're more likely to get a

response in one of the development newsgroups. Would suggest a repost.

 

--

Jon

 

 

"kalpesh" <kalpeshgedia@gmail.com> wrote in message

news:1183626668.448995.141960@z28g2000prd.googlegroups.com...

>i have a serious problem with CreateNamedPipe:

>

> I am developing a virtual printer driver in VISTA, for that at one

> point i use NamedPipe ok..

>

>

> Now if my all code is run good then there is no any problem becuse at

> the end of printing job i disconnect this named pipe and close this

> handle.

>

>

> Now consider the case that my NamedPipe is created and without close

> it my printer driver crash at some point means when ever second time

> any print job is there it does not createNamePipe gives me error

> ERROR_ALREADY_EXISTS that "Cannot create a file when that file

> already

> exists".

>

>

> here i write my code for create named pipe

>

>

> hBitmapPrinterPipe = CreateNamedPipe( L"\\\\.\\Pipe\

> \BitmapPrinterPipe", // pipe name

> PIPE_ACCESS_DUPLEX|

> FILE_FLAG_OVERLAPPED,

> PIPE_TYPE_BYTE

> |

> PIPE_WAIT,

>

>

> PIPE_UNLIMITED_INSTANCES,

> MAX_PATH,

> MAX_PATH,

> NMPWAIT_USE_DEFAULT_WAIT,

> NULL)

>

>

> if(hBitmapPrinterPipe == INVALID_HANDLE_VALUE) {

> GetLastError())

> }

>

>

> Using this code i create my pipe..

>

>

> so my question is there is any method from which i can reopen my

> existing server pipe and close it..

> OR there is any solution from which i can open the another instance

> of

> the same name pipe..

> so please write me which solution is best for me and how can i do

> it..

>

>

> Thanks in advance..

>

> "kalpesh" <kalpeshgedia@gmail.com> wrote ...

>>i have a serious problem with CreateNamedPipe:

>>

>> Now consider the case that my NamedPipe is created and without close

>> it my printer driver crash at some point means when ever second time

>> any print job is there it does not createNamePipe gives me error

>> ERROR_ALREADY_EXISTS that "Cannot create a file when that file

>>

>> so my question is there is any method from which i can reopen my

>> existing server pipe and close it..

>> OR there is any solution from which i can open the another instance

>> of the same name pipe..

 

"Jon" <Email_Address@SomewhereOrOther.com> wrote ...

>A bit specialised for this generalist group. You may get some kind soul

>will be willing to plough through your code, but you're more likely to get

>a response in one of the development newsgroups. Would suggest a repost.

 

I tend to agree with Jon. "microsoft.public.windows.vista.general" is a

user-oriented group, very few people here know much about Windows or

computers. You will get better answers in a group like

microsoft.public.win32.programmer.networks. (even though your code is

running on a single machine, Named Pipes are usually classified as a form of

network computing ... although they're also very suitable as a form of IPC).

 

By way of comment ... this is a very fundamental, basic question in Named

Pipes programming. I'm not trying to make fun of you, because you're

probably a much better programmer than me (it wouldn't be hard :-). But,

maybe you need to sit down with a good Named Pipes tutorial and really

understand the paradigm. There are many performance implications to

Overlapped IO, completion ports, etc which you will be missing if you just

find a Named Pipes code snippet which "works".

 

Good luck with the project!

--

Andrew McLaren

amclar (at) optusnet dot com dot au