progressionbar Draw a progression bar

## Syntax

    winId=progressionbar(mes)
                progressionbar(winId[,mes])

## Arguments

mes

  string, message to display.

winId

  integer greater than 0, window identificator.

## Description

`progressionbar(mes)` create a new progression bar, return window identificator.

`progressionbar(winId[,mes])` update the progression bar identificated as winId.

## Examples

    winId=progressionbar('Do something');
    realtimeinit(0.3);
    for j=0:0.1:1,
      realtime(3*j);
      progressionbar(winId);
    end
    close(winId);

## See also

- waitbar