winfo − Return window-related information
tk_chooseDirectory − pops up a dialog box for the user to select a directory.
filename − File name conventions supported by Tcl commands ______________________________________________________________________________
argc, argv, argv0, auto_path, env, errorCode, errorInfo, tcl_interactive, tcl_library, tcl_nonwordchars, tcl_patchLevel, tcl_pkgPath, tcl_platform, tcl_precision, tcl_rcFileName, tcl_traceCompile, tcl_traceExec, tcl_wordchars, tcl_version − Variables used by Tcl ______________________________________________________________________________
geometry, tk_library, tk_patchLevel, tk_strictMotif, tk_version − Variables used or set by Tk ______________________________________________________________________________
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