XmbDrawString, XwcDrawString, Xutf8DrawString - draw text using a single font
  set
void XmbDrawString(Display *display, Drawable d,
    XFontSet font_set, GC gc, int x, int y, _Xconst
    char *string, int num_bytes);
void XwcDrawString(Display *display, Drawable d,
    XFontSet font_set, GC gc, int x, int y, _Xconst
    wchar_t *string, int num_wchars);
void Xutf8DrawString(Display *display, Drawable
    d, XFontSet font_set, GC gc, int x, int
    y, _Xconst char *string, int num_bytes);
  - d
- Specifies the drawable.
- display
- Specifies the connection to the X server.
- font_set
- Specifies the font set.
- gc
- Specifies the GC.
- num_bytes
- Specifies the number of bytes in the string argument.
- num_wchars
- Specifies the number of characters in the string argument.
- string
- Specifies the character string.
- x
- 
    
 
- y
- Specify the x and y coordinates.
The XmbDrawString, XwcDrawString and Xutf8DrawString
  functions draw the specified text with the foreground pixel. When the
  XFontSet has missing charsets, each unavailable character is drawn with
  the default string returned by XCreateFontSet. The behavior for an
  invalid codepoint is undefined.The function Xutf8DrawString is an extension introduced by
    The XFree86 Project, Inc., in their 4.0.2 release. Its presence is indicated
    by the macro X_HAVE_UTF8_STRING.
XDrawImageString(3), XDrawString(3), XDrawText(3), XmbDrawImageString(3),
  XmbDrawText(3)
Xlib - C Language X Interface