Hello Norbert: There are a couple of ActiveX controls that could do this. Visual C++ comes with a registered multi-media control - you can get info on it by looking under your registered ActiveX controls and clicking on MS Communications Control. If you need more flexibility and ActiveX controls that easily fit into dialog boxes, you might try TegoSoft. You can look over their ActiveX controls at www.tegosoft.com If you are looking for some very simple classes that you can include in your project to set levels automatically, I can point you in some directions. Email me at: Regards, Myles

Take a look at this: http://codeguru.earthweb.com/gdi/jtdraw.shtml It is a pretty good starting point. Lot of graphics library that you can buy. But most are bloated with stuff you don't need.

If you still remember high school trigonometry, this problem is easy to solve!! OK, here we go.. Let the endpoint of the 1st line be (x1, y1) and (x2, y2) Let the endpoint of the 2nd line be (x3, y3) and (x4, y4). Let the slope of the 1st line be m1 and the 2nd line be m2. [the slope can be calculated by m1 = (y2 - y1)/(x2 - x1)]. Then the angle between the two lines is given by arctan[(m1 - m2)/(1 + m1*m2)]. Of course you have to deal with many other factors and boundary conditions, the type of coordinate system you're using, and convert radian to degree, etc... Hope this helps. Eddie