public bool RegisterForDeviceChange(bool Register, IntPtr WindowsHandle)
{
var flag = false;
if (Register)
{
var structure = new USBClass.Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE();
var cb = Marshal.SizeOf <USBClass.Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE>(structure);
structure.dbcc_size = cb;
structure.dbcc_devicetype = 5;
var num1 = new IntPtr();
IntPtr num2 = Marshal.AllocHGlobal(cb);
Marshal.StructureToPtr <USBClass.Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE>(structure, num2, true);
deviceEventHandle = Win32Wrapper.RegisterDeviceNotification(WindowsHandle, num2, 4);
flag = deviceEventHandle != IntPtr.Zero;
if (!flag)
{
Marshal.GetLastWin32Error();
}
Marshal.FreeHGlobal(num2);
}
else
{
if (deviceEventHandle != IntPtr.Zero)
{
flag = Win32Wrapper.UnregisterDeviceNotification(deviceEventHandle);
}
deviceEventHandle = IntPtr.Zero;
}
return(flag);
}
/// <summary>
/// Registers to be notified when devices are added or removed.
/// </summary>
/// <param name="register">True to register, False to unregister</param>
/// <param name="f">Form</param>
/// <returns>True if successfull, False otherwise</returns>
public bool RegisterForDeviceChange(bool doRegister, Form f)
{
var Status = false;
long LastError;
if (doRegister)
{
var deviceInterface = new Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE();
int size = Marshal.SizeOf(deviceInterface);
deviceInterface.dbcc_size = size;
deviceInterface.dbcc_devicetype = (int)Win32Wrapper.DBTDEVTYP.DBT_DEVTYP_DEVICEINTERFACE;
var buffer = default(IntPtr);
buffer = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(deviceInterface, buffer, true);
deviceEventHandle = Win32Wrapper.RegisterDeviceNotification(f.Handle, buffer,
(int)(Win32Wrapper.DEVICE_NOTIFY.DEVICE_NOTIFY_WINDOW_HANDLE | Win32Wrapper.DEVICE_NOTIFY.DEVICE_NOTIFY_ALL_INTERFACE_CLASSES));
Status = deviceEventHandle != IntPtr.Zero;
if (!Status)
{
LastError = Marshal.GetLastWin32Error();
}
Marshal.FreeHGlobal(buffer);
}
else
{
if (deviceEventHandle != IntPtr.Zero)
{
Status = Win32Wrapper.UnregisterDeviceNotification(deviceEventHandle);
}
deviceEventHandle = IntPtr.Zero;
}
return(Status);
}