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# Experiences

Tcl/Tk has saved us countless hours in the development of the graphical display for the Thunder and Lightning protocol simulator. In fact, without Tcl/Tk, it is likely that the display application would never have come into existence, because our primary research involves developing protocols for high-speed networks, not designing graphical interfaces! Only the ease and rapidity of design provided by Tcl/Tk have afforded us the opportunity to develop the display interface. Nonetheless, we have uncovered several areas in the language that we believe could use further development. We present these shortcomings in this section, along with the techniques we used to circumvent them.

- Sockets between Heterogeneous Platforms
- Canvas Improvements
  - Relief Effects
  - Selection Based on Multiple Tags
  - Megaitems