The tcl extension module gives access to the tcl library with functionality and interface similar to the c functions of tcl.
* creating tcl interpreters
* executing tcl code in an interpreter
* binding in new tcl procedures
* manipulating the result field of a tcl interpreter
* setting and getting values of variables in a tcl interpreter
* tying perl variables to variables in a tcl interpreter
tcl is a powerful, easy to use, embeddable, cross-platform interpreted scripting language.