Device Drivers

Custom Printer Driver
Hi. I'm trying to create a custom printer driver which is supposed to intercept the printer output and write it to a file (for example as PostScript or maybe as individual image filed) instead of sending it to an actual printer (it's supposed to do some more processing on the resulting files, so a simple "print to ... 20 Oct 2005 18:38

MSVAD Simple Sample
Hallo I comipile and install MSVAD simple driver from DDK samples. But there is something strange in it. When I use SndVol32 program I can change volum and mute lines only for rendrering pins. When I go to record devices tabs I can select msvad from list, but it hasn't any visible lines and controls. I topology... 18 Oct 2005 17:44

How can I DbgPrint a UNICODE_STRING ?
Can someone help to print a UNICODE_STRING to the debig window? The string is in POBJECT_ATTRIBUTES ObjectAttributes ObjectAttributes->ObjectName I believe this is correct so far? But how can I print it, can I use DbgPrint ? DbgPrint(("message %s \n", buffer )); but buffer is normally ansi Thanks ... 18 Oct 2005 19:49

Storage spti example problems
Hi, When I build & run this sample on a secondary hard disk (e:), I get "Incorrect function" errors on the write and read data buffer operations. Any reason this sample shouldn't work as is? Ultimately I need to read & write directly to a disk, as the sample should do. I can get read to work by changing to ... 23 Oct 2005 02:28

Virtual COM port emulation over USB
Hi, I need to write a driver which supports virtual COM port emulation over USB (for win2k/XP). Can I make use of usbser.sys provided by Microsoft. Where can i get a complete description of usbser.sys. Does it provide Bulk mode transfer. How Can i add an upper/lower filter to usbser.sys. Thanks in advance... 11 Oct 2005 02:23

USB Problem when using a Philips ISP1521 based hub
We are using a TI TUSB3410 USB to Serial chip and recently identified an issue when using this device with a Philips based ISP1521 based Hub. On the USB-IF Developers Discussion Forum a post was made that matches our problem exactly. This post also has a statement that Philips apparently made which states the... 11 Oct 2005 19:07

parallel class driver installer
Hi there, I´m having problems in creating a installer tool for a customized parport class driver i´ve written, based on win2k sample parclass driver; I am using SetuDiXX and SetupInstallXX apis for this purpose, but no success so far; here goes some part of the code i am using, error handling omitted.... ... 4 Oct 2005 11:29

Audio Driver problem
I develop driver for virtual audio device. As base for driver I'm using simle driver from msvad sample. My driver in topology minidriver has only one input pin - microphone. In topology I have 2 nodes volume and mux. connection are: microphone pin -> volume control node -> mux control -> topology output. Wave... 30 Sep 2005 17:15

Question about structure of "USBCAMD_DEVICE_EXTENSION"
When I try to add new field for RemoveLock, I notice that there is one special field "CameraDeviceContext". PUCHAR CameraDeviceContext[0]; So I search keyword "CameraDeviceContext" than I only found one : #define USBCAMD_GET_DEVICE_CONTEXT(de) ((PVOID)(&(de)->CameraDeviceContext[0])) Now, my quest... 30 Sep 2005 10:58

DDK rev information -- 3790 or 5112
1) I have dll & driver compiled in different revs of DDK. I dont have any code in driver/dll to tell me which rev of DDK is used for building these binaries. Is there any way I can find which DDK rev I used to build those binaries (for testing only). 2) For future (testing use) I want to save DDK rev information ... 28 Sep 2005 01:22