/// Starts the long operation
static void start(void* theSender = 0);
/// Stops the long operation
static void end(void* theSender = 0);
/// Returns true if the long operation is performed
/// Starts the long operation
static void start(void* theSender = 0);
/// Stops the long operation
static void end(void* theSender = 0);
/// Returns true if the long operation is performed