@TK[expression] : Returns the string result of the Tk expression. For example, this will execute the Tk script test.tcl:

 

 echo %@tk[source test.tcl]

 

Because of the way the Tk interpreter works, it is not possible for TCC-RT to maintain a persistent interpreter after executing a Tk script. TCC-RT will close the current Tcl/tk interpreter and create a new one the next time @TCL is executed.

 

See also @TCL.