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HID Code Comments

Various comments on my HID code. I haven't implemented these changes in the online code.

Suggested changes for 64 bits

In FileIO, use:

internal static extern SafeFileHandle CreateFile(String lpFileName, UInt32 dwDesiredAccess, Int32 dwShareMode, IntPtr lpSecurityAttributes, Int32 dwCreationDisposition, Int32 dwFlagsAndAttributes, IntPtr hTemplateFile);

In DeviceManagement, use:

internal static extern Int32 SetupDiCreateDeviceInfoList(ref Guid ClassGuid, IntPtr hwndParent);

In DeviceManagement.cs, change:

IntPtr pDevicePathName = new IntPtr(detailDataBuffer.ToInt32() + 4);

to:

IntPtr pDevicePathName = detailDataBuffer + 4;

Bug in DeviceNameMatch routine if the charset isn't English

In this routine:

internal Boolean DeviceNameMatch(Message m, String mydevicePathName)

in DeviceManagement.cs, when using the installed culture, string.compare returns false even it compares identical strings.

Change:

if ((String.Compare(DeviceNameString, mydevicePathName, true) == 0))

to:

if ((String.Compare(DeviceNameString, mydevicePathName, true, System.Globalization.CultureInfo.InvariantCulture) == 0))