[Paraview] How does paraview pass multiple filenames to reader plugin?

[庞庆源]

I have read some source of paraview plugin.All of them  define a char
pointer such as:
char *FileName;
and have two macro:
 vtkSetStringMacro(FileName);
 vtkGetStringMacro(FileName);
But paraview can choose multiple files once.And I would like to get the
filenames.So what should I do?Can someone give me a simple example?
-- 
庞庆源 <pangqingyuan1991 at gmail.com>
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