window_screen_copy_init_c (ul_windowlib)

	status.i4.v = window_screen_copy_init_c(last_column.i4.v)

	This routine creates a callback which will cause the current
	alphanumeric screen to be copied to a graphics window upon
	an interrupt on line 1 of the background window.

	last_column	last column in the copy screen interrupt field on
			line 1 of the background window

	This function returns ACNET status values as follows:

	CLIB_OK			success
	CLIB_INVARG		invalid column passed

	This function requires the following include files:

	ul_windowlib_h:windowlib_h, acnet_errors_h

	Related functions:

	window_intype, window_callback_init

	C/C++ usage:

	int	status;
	int	last_column;

	status = window_screen_copy_init_c(last_column);