public RAWINPUTDEVICELIST[] GetAllHIDDevices()
{
IntPtr pnumdevices = Marshal.AllocHGlobal(Marshal.SizeOf <uint>());
try
{
uint retval = Win32Interop.GetRawInputDeviceList(IntPtr.Zero, pnumdevices,
(uint)Marshal.SizeOf <RAWINPUTDEVICELIST>());
if (retval == (uint)0xFFFFFFFF)
{
Win32Interop.GetLastErrorAndThrow();
}
var devicesNum = Marshal.PtrToStructure <uint>(pnumdevices);
var devices = new RAWINPUTDEVICELIST[devicesNum];
retval = Win32Interop.GetRawInputDeviceList(
Marshal.UnsafeAddrOfPinnedArrayElement(devices, 0),
pnumdevices,
(uint)Marshal.SizeOf <RAWINPUTDEVICELIST>());
if (retval == (uint)0xFFFFFFFF)
{
Win32Interop.GetLastErrorAndThrow();
}
return(devices);
}
finally
{
Marshal.FreeHGlobal(pnumdevices);
}
}
public string GetHIDDeviceName(RAWINPUTDEVICELIST device)
{
var strptr = Marshal.AllocHGlobal(255);
var pSize = Marshal.AllocHGlobal(Marshal.SizeOf <uint>());
Marshal.StructureToPtr((uint)255, pSize, false);
try
{
var retval = Win32Interop.GetRawInputDeviceInfoW(device.hDevice, 0x20000007, strptr, pSize);
if (retval == 0xFFFFFFFF)
{
Win32Interop.GetLastErrorAndThrow();
}
return(Marshal.PtrToStringUni(strptr));
}
finally
{
Marshal.FreeHGlobal(pSize);
Marshal.FreeHGlobal(strptr);
}
}
public RID_DEVICE_INFO GetHIDDeviceInfo(RAWINPUTDEVICELIST device)
{
var size = Marshal.SizeOf <RID_DEVICE_INFO>();
var infoStructPtr = Marshal.AllocHGlobal(size);
var pSize = Marshal.AllocHGlobal(Marshal.SizeOf <uint>());
Marshal.StructureToPtr(size, pSize, false);
try
{
var retval = Win32Interop.GetRawInputDeviceInfoW(device.hDevice, 0x2000000b, infoStructPtr, pSize);
if (retval == 0xFFFFFFFF)
{
Win32Interop.GetLastErrorAndThrow();
}
return(Marshal.PtrToStructure <RID_DEVICE_INFO>(infoStructPtr));
}
finally
{
Marshal.FreeHGlobal(pSize);
Marshal.FreeHGlobal(infoStructPtr);
}
}
