LinePick and Object In View

can anyone here guide me where to find a good codes how to use linepick to detect whether the object are in view of the camera. i try EntityInView and EntityVisible before but it still give me 'true' even my camera facing somewhere else and the object are not in view...

Is this the kind of examples you are looking for?

Selecting 3d objects :
http://www.blitzbasic.com/codearcs/codearcs.php?code=538

Line of Sight Detection
http://www.blitzbasic.com/codearcs/codearcs.php?code=532

Both of these are in the code archives - my second home ;)

oK i'll test that line of sight now... thanqs