myvtm/Module/mod_screenshot/ScreenShot.xml

<?xml version="1.0" encoding="gb2312" ?>
<entity name="ScreenShot">	
	<!-- ½ØÆÁ·þÎñ -->
	<class name="ScreenShotService" overlap="true"  exclusive="false">
		<twoway name="StartScreenShot" overlap="true">
			<req>
				<param name="Left" type="int"/>
				<param name="Top" type="int"/>
				<param name="Width" type="int"/>
				<param name="Height" type="int"/>
			</req>
			<res>
				<param name="Image" type="blob"/>
			</res>
		</twoway>
	</class>	
</entity>