| ActiveTcl User Guide |

## Tcl/Tk Documentation > Tcl/Tk Keywords - U

### Tcl/Tk Applications | Tcl Commands | Tk Commands | Tcl Library | Tk Library

### A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

uid
  ConfigWidg
unicode
  ByteArrObj, StringObj, ToUpper, UniCharIsAlpha, Utf
unique identifier
  GetUid, SetClass
units
  wm
unknown
  library
unloading
  unload, Exit
unmanaged
  ManageGeom
unmap
  MaintGeom, MapWindow
unset
  trace, SetVar
update
  dict, update
upvar
  UpVar
user
  Translate
utf
  ByteArrObj, Encoding, ToUpper, Utf

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