[wdmaudiodev] Re: Problem getting MSVAD driver handle
- From: Tim Roberts <timr@xxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 15 Jul 2010 09:47:05 -0700
You call SetupDiGetDeviceInterfaceDetail. That fills in an
SP_DEVICE_INTERFACE_DETAIL_DATA structure that includes a DevicePath
member. That member is a string which is the file name you give to
CreateFile.
>> ... there is already a
>> well-defined mechanism for sending custom requests to KS drivers.
> What is the well-defined mechanism for sending custom requests to KS
> drivers?
Create a custom KS property set with as many members as you need, just
like the standard properties (such as volume). You then use the
IKsControl or IKsProperty interfaces to send IOCTL_KS_PROPERTY requests
into the driver, which the standard port class dispatcher already knows
how to handle.
--
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.
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