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CentOS 7.0 - man page for delch (centos section 3X)

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curs_delch(3X)									   curs_delch(3X)

       delch, wdelch, mvdelch, mvwdelch - delete character under the cursor in a curses window

       #include <curses.h>

       int delch(void);
       int wdelch(WINDOW *win);
       int mvdelch(int y, int x);
       int mvwdelch(WINDOW *win, int y, int x);

       These  routines	delete the character under the cursor; all characters to the right of the
       cursor on the same line are moved to the left one position and the last character  on  the
       line  is  filled with a blank.  The cursor position does not change (after moving to y, x,
       if specified).  (This does not imply use of the hardware delete character feature.)

       All routines return the integer ERR upon failure and an OK (SVr4 specifies only "an  inte-
       ger value other than ERR") upon successful completion.

       Functions  with	a  "mv" prefix first perform a cursor movement using wmove, and return an
       error if the position is outside the window, or if the window pointer is null.

       Note that delch, mvdelch, and mvwdelch may be macros.

       These functions are described in the XSI Curses standard, Issue 4.  The standard specifies
       that they return ERR on failure, but specifies no error conditions.


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