[ns] how to bind string?

[Fangweiwei]

hi,everyone!
  As you can see in tclcl.h, you can bind your tcl to c++ with function "bind",but I wonder if anyone knows how to bind a string? in the tclcl.h, most of binding is int and double.

  Anyone who has done some work on it ? can you help me?
  Thank you very much!
                                       fang weiwei