status.i4.v = window_current_column_c(window_id.i2.v, column.i4.v,

	This routine allows the programmer to calculate the current
	column in scrolling window that had an original value of

	window_id	ID of desired window
	column		original window column number
	current_column	returned current window column

	This function returns status values as follows:

	OK			success
	CBS_INVARG		invalid window ID or column
	CBS_NO_WINDOW		window doesn't exist

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	window_current_row_c, window_physical_column_c, window_virtual_column_c,
	window_hscroll_c, window_row_to_entry_c, window_entry_to_row_c,
	window_last_io_location_c, window_is_in_scroll_buffer_c,
	window_next_scroll_row_c, window_scroll(_c), window_tvm(_c),

	C/C++ usage:

	short	window_id;
	int	status;
	int	column = COLUMN;
	int	current_column;

	status = window_current_column_c(window_id,column,&current_column);