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C/C++

Accessing Device Drivers from C#

By David Union, April 01, 2002

Device Drivers are written largely in C or C++. No explicit support for Device Driver communication is included in the current .NET framework. David implements support with C# and discusses how to access Win32 APIs using the Platform Invocation Services and how to make that reusable from within the .NET framework with Overloading.
HexWeb HTML

Example 11
Some of the APIs need to return data unmanaged

[DllImport("Setupapi.dll", CharSet=CharSet.Auto, SetLastError = true)]
public static extern bool SetupDiGetDeviceInstanceId(
int DeviceInfoSet, ref SP_DEVINFO_DATA DeviceInfoData,
[MarshalAs(UnmanagedType.LPWStr)] String DeviceInstanceId,
int DeviceInstanceIdSize, ref int RequiredSize);


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