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POSetupAPI.DLL to HID.DLL
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copied!<p>Using SetupAPI I execute the function <code>SetupDiGetClassDevs</code> and get a pointer or a handle.</p> <p>Then I start a loop and run:</p> <pre><code>Return = SetupDiEnumDeviceInterfaces(); </code></pre> <p>with</p> <pre><code>SP_DEVICE_INTERFACE_DATA.cbSize = 0 </code></pre> <p>to get the size that <code>SP_DEVICE_INTERFACE_DATA</code> needs to be.</p> <p>Then I set this size and execute again: </p> <pre><code>SP_DEVICE_INTERFACE_DATA.cbSize = return; // (the size) SetupDiEnumDeviceInterfaces(); </code></pre> <p>From the data structures I get:</p> <p><code>DevicePath</code> from <code>SP_DEVINFO_DATA</code> and a heap of information from the registry if I want it I believe.</p> <p>What I really want is to access the HID library and call <code>HidD_GetAttributes</code> to get the <code>VendorID</code>, <code>ProductID</code>, and <code>VersionNumber</code> from this enumerated device, so I can identify the device.</p> <p>I expect this particular info would come from the USB device itself. Can anyone show me how to do that?</p> <p>By the way, in my version of Windows XP I’m using the registry path, I cannot find <code>HKEY_LOCAL_MACHINE\Enum\HID\...\Class</code>.</p> <p>I don't even find <code>HKEY_LOCAL_MACHINE\Enum\</code>. I think this is because I have not executed the function <code>SetupDiEnumDeviceInterfaces</code>.</p> <p>I can only find complete data in Lakeview Research. But it does not cover this subject. Why is it all over the net when it's junk?</p>

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