delch, wdelch, mvdelch, mvwdelch - delete character under
the cursor in a curses window
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 integer value other than ERR")
upon successful completion.
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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