hpux man page for xblackpixel

XBlackPixel*()															    XBlackPixel*()

Name
  XBlackPixel, XBlackPixelOfScreen, BlackPixel, BlackPixelOfScreen - get the black pixel value.

Synopsis
  unsigned long XBlackPixelOfScreen(screen)
	   Screen *screen;
  unsigned long XBlackPixel(display, screen_number)
	   Display *display;
	   int screen_number;

Arguments
  screen    Specifies the appropriate Screen structure.

  display   Specifies a connection to an X server; returned from XOpenDisplay().

  screen_number
	    Specifies the appropriate screen number.

Returns
  A pixel value.

Description
  Each	screen	has  a default colormap which has pixel values for black and white already allocated.  These functions return the black pixel
  value.  Note that this pixel value only represents black in a screen's default colormap.

  XBlackPixel() and XBlackPixelOfScreen() are equivalent except that they require different arguments.	One requires a pointer	to  a  Screen
  structure,  while  the  other  requires  a screen number.  Unless you already have the pointer to a Screen structure in a variable, XBlack-
  Pixel*() is more convenient.

  The C language macros BlackPixel() and BlackPixelOfScreen() are equivalent and slightly more efficient.

See Also
  XWhitePixel*(), XWhitePixelOfScreen(), XDefaultColormap*().

Xlib - Macro Equivalents													    XBlackPixel*()