lxblnk(_c)

	lxblnk(row.i4.r, column.i4.r, num_chars.i4.r)

	lxblnk_c(row.i4.v, column.i4.v, num_chars.i4.v)

	This routine writes blanks on the current graphics screen
	starting at "row", "column".

	row, column	starting screen position
	num_chars	number of blanks

	This function requires the following include files:

	cbslib_h

	Related functions:

	lxprint(_c), wn_text(_c), lxtext(_c), lx_row_to_pix(_c),
	lx_col_to_pix(_c), read_lx_format