TCL_ExistInterp - Return %T if a tcl slave interperter exists
This routine allows to test if TCL interpreter exists.
TCL_ExistInterp('SlaveInterp')
TCL_CreateSlave('SlaveInterp')
TCL_ExistInterp('SlaveInterp')
TCL_DeleteInterp('SlaveInterp')
TCL_CreateSlave, TCL_DeleteInterp,
Allan CORNET