EVP Toolbox
	video_close_w( handle ) - close an opened video file
	video_close_all_w() - close all opened video file ( opened by video_open_w, not video_open )

Calling Sequence
	video_close_w( handle );
	video_close_all_w();
	
Parameters
	* handle : a return handle from video_open_w.
	
Description
	close opened video files.
	
Examples
	Here is a example for converting video format:
	in = video_open( 'ww.mpg');
	out = video_open_w ('out.swf', 400000, 352, 288, 25);
	[frame, num ] = video_info(in)

	for i=1:num
	 im = video_read_frame(in);
	 video_write_frame( im, out );
	end
	
	video_close_w( out );
	video_close(in);