| ActiveTcl User Guide |

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

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

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cache
  InternAtom
callback
  CallDel, CrtChnlHdlr, CrtCloseHdlr, CrtFileHdlr, CrtTimerHdlr, DoOneEvent, DoWhenIdle, Exit, Limit, CrtCmHdlr, CrtErrHdlr, CrtGenHdlr, EventHndlr, HandleEvent, ManageGeom, QWinEvent, SetClassProcs
cancel
  after
canvas
  canvas, CanvPsY, CanvTkwin, CanvTxtInfo, CrtItemType
cap style
  ConfigWidg, GetCapStyl
caret
  SetCaret
carriage return
  fconfigure
case
  ToUpper
case conversion
  string
catch
  catch, return
cell
  grid
center
  GetJustify
centimeters
  GetPixels
channel
  chan, close, eof, fcopy, fileevent, flush, gets, puts, read, refchan, socket, tell, ChnlStack, CrtChnlHdlr, GetOpnFl, OpenFileChnl
channel closing
  CrtCloseHdlr
channel driver
  CrtChannel, OpenFileChnl, SetChanErr
channel registration
  CrtChannel
channel type
  CrtChannel, SetChanErr
character
  string
check
  ttk_checkbutton
checkbutton
  checkbutton
child
  DetachPids
children
  winfo
choice
  ttk_combobox
class
  options, winfo, AddOption, GetOption, SetClass, SetClassProcs
classification
  UniCharIsAlpha
cleanup
  Exit
clear
  clipboard, selection, Clipboard, ClrSelect
client
  OpenTcp
clientData
  TraceCmd, TraceVar
clipboard
  clipboard, Clipboard
clock
  clock, CrtTimerHdlr, QWinEvent
close
  close
color
  colors, palette, photo, 3DBorder, CanvPsY, ConfigWidg, ConfigWind, GetColor, SetOptions
color selection dialog
  chooseColor
colormap
  GetClrmap, GetVisual, SetVisual, WindowId
command
  info, mathop, namespace, rename, trace, ttk_button, AppInit, CrtCommand, CrtInterp, CrtObjCmd, CrtSlave, CrtTrace, Namespace, ParseCmd, RecEvalObj, RecordEval, SetResult, TraceCmd, WrongNumArgs
command line
  ParseArgv
command substitution
  subst, SubstObj
command-line arguments
  Tcl_Main, Tk_Main
commands
  Limit
compare
  expr, string
compiler
  tclvars
complete command
  CmdCmplt
compression
  ChnlStack
concat
  StringObj
concatenate
  concat, eval, Concat, StringObj
condition variable
  Thread
conditional
  if
configuration
  RegConfig
configuration option
  SetOptions
configuration options
  ConfigWidg
configure
  ttk_widget, ConfigWind
connection
  socket
console
  console, CrtConsoleChan
container
  ttk_frame, ttk_labelframe
containing
  CoordToWin
context
  uplevel, upvar
continue
  continue, return, AllowExc
conversion
  GetInt, PrintDbl, GetDash
conversion specifier
  format, scan
convert
  Encoding, SplitList, GetPixels
coordinates
  CoordToWin, GetRootCrd
copy files
  file
cpu architecture
  platform, platform_shell
create
  dict, open, CrtCommand, CrtInterp, CrtObjCmd, CrtTrace, CrtWindow
ctype
  string
current directory
  filename
cursor
  cursors, ConfigWidg, GetCursor, SetCaret, SetOptions
custom
  ConfigWidg

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