/// <summary>
/// Function to enumerate raw input devices.
/// </summary>
/// <returns>An array of raw input device structures.</returns>
public unsafe static RAWINPUTDEVICELIST[] EnumerateInputDevices()
{
int deviceCount = 0;
int structSize = DirectAccess.SizeOf <RAWINPUTDEVICELIST>();
if (GetRawInputDeviceList(IntPtr.Zero, ref deviceCount, structSize) < 0)
{
throw new Win32Exception();
}
if (deviceCount == 0)
{
return(new RAWINPUTDEVICELIST[0]);
}
RAWINPUTDEVICELIST *deviceListPtr = stackalloc RAWINPUTDEVICELIST[deviceCount];
if (GetRawInputDeviceList((IntPtr)deviceListPtr, ref deviceCount, structSize) < 0)
{
throw new Win32Exception();
}
var result = new RAWINPUTDEVICELIST[deviceCount];
fixed(RAWINPUTDEVICELIST *resultPtr = &result[0])
{
DirectAccess.MemoryCopy(resultPtr, deviceListPtr, structSize * deviceCount);
}
return(result);
}
private static extern unsafe int GetRawInputDeviceList(RAWINPUTDEVICELIST *pRawInputDeviceList, ref int puiNumDevices, int cbSize);
