C / C++ / MFC

<br />
if(WSAGetLastError()==183){<br />
    ...// Reconnect<br />
}<br />

ON_MESSAGE(WM_DEVICECHANGE, &CMainFrame::OnMyDeviceChange)

LRESULT CMainFrame::OnMyDeviceChange(WPARAM wParam, LPARAM lParam)
{
	LRESULT lpReturn = TRUE;
	if (wParam == DBT_DEVICEQUERYREMOVE)
	{
		PDEV_BROADCAST_HDR pHdr = (PDEV_BROADCAST_HDR)lParam;      
		switch( pHdr->dbch_devicetype ) 
		{
			case DBT_DEVTYP_DEVICEINTERFACE:
				{
				}

			case DBT_DEVTYP_HANDLE:
				{
				}

			case DBT_DEVTYP_OEM:
				{
				}

			case DBT_DEVTYP_PORT:
				{
				}

			case DBT_DEVTYP_VOLUME:
				{
					PDEV_BROADCAST_VOLUME pDevVolume = (PDEV_BROADCAST_VOLUME)pHdr;
					MessageBox("The user wants to remove this USB drive.");
					//Do your processing and close all handles
					//lpReturn = BROADCAST_QUERY_DENY; if not ready to unload USB
					lpReturn = TRUE;					
					break;
				}
		}
	}
	return lpReturn;
}

HDEVNOTIFY hDevNotify = NULL;
GUID InterfaceClassGuid={0xA5DCBF10L, 0x6530, 0x11D2, 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED}; //For USB Drives
cHF.DoRegisterDeviceInterface(this->GetSafeHwnd(), InterfaceClassGuid, hDevNotify);

BOOL CHelperFucntions::DoRegisterDeviceInterface(HWND hWnd, GUID InterfaceClassGuid, HDEVNOTIFY hDevNotify)
{
    char szMsg[80];
    DEV_BROADCAST_DEVICEINTERFACE NotificationFilter;

    ZeroMemory( &NotificationFilter, sizeof(NotificationFilter) );
    NotificationFilter.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
    NotificationFilter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
    NotificationFilter.dbcc_classguid = InterfaceClassGuid;

    hDevNotify = RegisterDeviceNotification(hWnd, &NotificationFilter, DEVICE_NOTIFY_WINDOW_HANDLE); //or DEVICE_NOTIFY_ALL_INTERFACE_CLASSES

    if(!hDevNotify) 
    {
        wsprintf(szMsg, "Could not register to receive notifications about drive events: %d\n", 
                GetLastError());
        MessageBox(hWnd, szMsg, "RegisterDeviceNotification failed", MB_OK);        
        return FALSE;
    }
    return TRUE;
}