Move the cursor to coordinates (y,x) and insert the character
    ch into the specified window. The mvinsch function acts on the
    stdscr window.

    Format

      #include  <curses.h>

      int mvinsch  (int y, int x, char ch);

      int mvwinsch  (WINDOW *win, int y, int x, char ch);

  Additional Information (explode) :

• Arguments
• Description
• Return Values