| ActiveTcl User Guide |

## Tcl/Tk Documentation > TkLib > GetCapStyl

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

### NAME

Tk_GetCapStyle, Tk_NameOfCapStyle - translate between strings and cap styles

### SYNOPSIS

#include <tk.h>
int
Tk_GetCapStyle(interp, string, capPtr)
const char *
Tk_NameOfCapStyle(cap)

### ARGUMENTS

Tcl_Interp *interp (in)
  Interpreter to use for error reporting.
const char *string (in)
  String containing name of cap style: one of “butt”, “projecting”, or “round”.
int *capPtr (out)
  Pointer to location in which to store X cap style corresponding to string.
int cap (in)
  Cap style: one of CapButt, CapProjecting, or CapRound.

### DESCRIPTION

Tk_GetCapStyle places in *capPtr the X cap style corresponding to string. This will be one of the values CapButt, CapProjecting, or CapRound. Cap styles are typically used in X graphics contexts to indicate how the end-points of lines should be capped. See the X documentation for information on what each style implies.

Under normal circumstances the return value is TCL_OK and interp is unused. If string does not contain a valid cap style or an abbreviation of one of these names, then an error message is stored in interp->result, TCL_ERROR is returned, and *capPtr is unmodified.

Tk_NameOfCapStyle is the logical inverse of Tk_GetCapStyle. Given a cap style such as CapButt it returns a statically-allocated string corresponding to cap. If cap is not a legal cap style, then “unknown cap style” is returned.

### KEYWORDS

butt, cap style, projecting, round
Copyright © 1995-1997 Roger E. Critchlow Jr. Copyright © 1990 The Regents of the University of California. Copyright © 1994-1996 Sun Microsystems, Inc.