Ramon,
most probably you need a dialog. What about:
getNumber("prompt", defaultValue)
Perhaps you may study the macro functions manual at:
<
http://rsb.info.nih.gov/ij/developer/macro/functions.html>
>Hi, everything worked fine, Getting the Id of an image after image
>calculation works fine in order to invoke that window, finally I would like
>the plugin to ask the user the value to use as threshold for the different
>channels, any idea how?
>thanks,
>
>ramon
HTH
Herbie