To Dmitri,
Most printer don’t required reverse data transfer, thus readfile can fail to get output from printer.
Most printer comunicated with printer using ieee-1284 device ID ( IOCTL_USBPRINT_GET_1284_ID) data pipe only. Bulk transfer from printer to PC is not nesasary.

To Brandon,
In VB6, I do in this ways.

‘HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\DeviceClasses\{28d78fad-5a12-11d1-ae5b-0000f803a8c2}\##?#USB#Vid_4348&Pid_5584#5&13b4f648&0&1#{28d78fad-5a12-11d1-ae5b-0000f803a8c2}

Public Type guid: Data(3) As Long: End Type ‘A GUID is 16 bytes long

Public Sub usbPrintGuid()
‘{28d78fad-5a12-11d1-ae5b-0000f803a8c2}
GUID_DEVINTERFACE_USBPRINT.Data(0) = &H28D78FAD
GUID_DEVINTERFACE_USBPRINT.Data(1) = &H11D15A12
GUID_DEVINTERFACE_USBPRINT.Data(2) = &H5BAE
GUID_DEVINTERFACE_USBPRINT.Data(3) = &HC2A803F8
End Sub

useGuid = GUID_DEVINTERFACE_USBPRINT
PnPHandle& = SetupDiGetClassDevs(useGuid.Data(0), 0, 0, &H12)
If (PnPHandle& = -1) Then ErrorExit (”Could not attach to PnP node”)

Do While SetupDiEnumDeviceInterfaces(PnPHandle&, 0, useGuid.Data(0), HidEntry&, DeviceInterfaceData.cbsize)

I can’t find anything in the registry about GUIDs or the number you found either…

Does anybody has this code working under .NET ? Is it possible to send some source code to start this USB stuff under .NET ?

I need to get the real-time status of an USB connected HP Laserjet to see if it is Out-Of-Paper. Reading about the GET_PORT_STATUS from the USBPrint specifications this would do the job.

Do you guys think it is possible ?

Tried to compile the original Code under VS2008 (VC++ Project) but I get lot’s of errors. I guess I first need to install the latest SDK’s and DDK’s for the missing include files.

Any help is appriciated !

Thanks
Danny

while(SetupDiEnumDeviceInterfaces(hInfo, 0, (struct _GUID *)&USBIODS_GUID, devicecount, &Interface_Info))
Here the control is not entering inside the while loop.
The PC does not have any drivers for mobile. In this condition , what changes i need to do for establishing the communication. Kindly help as this is a critical issue i am facing.
Thankyou in advance

Your code serves well as a blueprint and guideline. At least I gained extremely high confidence seeing so many people having positive result with your code. That gave me the motivation to keep trying with your code (keep trying? allow me to explain later).

To be honest, I am a totally newbie who needs to implement USB printing. I tried #libusb, libusbdotnet, libusb-win32, tons of other references from Google, Microsoft MSDN, other people’s blogs, forums, anything you could imagine in the world of Internet, I tried. However, I didn’t have success with those solution.

Until I ran into your blog during endlessly googling for solution, it gave me some light in the end of tunnel. I really appreciate that. However, it isn’t smooth sailing for me either. I am not too sure how other people in the comments ‘got it work like a charm, magic, ….’ That doesn’t work for me from the first place, I really had hard time to get the code work.

I am totally new to WDK/DDK(in the past). I downloaded WDK for WIndows Vista to my Windows XP [note, WDK for Vista works for XP, according to Microsoft website]. The WDK is a monster download, it is 2.3GB. Setup the right include/lib paths. By the time I thought the code will work like a charm for me, I realize that the code contains some type definition which is unknown to the compiler.

Then I need to find out which include file has the type definition. After that, I discovered that some of the API takes more argument than provided in the code. Being completely ignorant to the API, I need to do some best guess and googling around to temporarily workaround the compilation error. That added into uncertainty if I introduced some bug into the code and made it not working.

Then I ran into runtime issue - the code seems to abort somewhere when it is trying to get some USB information. Then I am not sure if the information is really needed for data writing.

After all those try, try and try, and of course heavily modification to the code, finally it works. And I still don’t know why it will happen, due to different DDK version, compiler version? I don’t know.

There are many comments, those are good suggestions, but I don’t know which is the more workable one for me - some says it works like magic, some says removing the headers, some says compile without DDK, all made up some complicated to follow.

At last, I just want to reiterate - [b]your blog and code are really good starting point for me. I wouldn’t be successful without going through your code, although I did a lot changes to your original code to make it work. [/b]I want to thank you for that. On the other hand, I guess a complete project (with the ready-to-compile-and-build source code and makefile) will make your blog more complete.

I know you are just trying to help. But just that one tiny step from you, will be a big step of help for others struggling to get USB print work. Thanks again for your blog and code.

its nice to find such people to share their code to the wold for free.

i ahev to write one device driver for USB drive with own protocol. can any one suggest me where to start.

thanks