Compositing

I have a program designed to rotoscope lightsabers. At the moment, I still am working on getting it to composite, so it draws it at specified coordinates. Click here to get it. You will need to right click and choose save to disk. I made an array of lines, and brought all to the front in order, starting with the back one, so the front ones which would be the littler parts of the glow were in front. When you click on a button, it draws a saber that color. The Merge Pen and Copy Pen buttons are from when I was testing the use of the Merge Pen. That doesn't work too well. I then have it open a second form, which upon clicking a button, will bitblt from the original form, using the MERGECOPY code. For some reason, nothing happens.

Ok. I went through, and realized that the constants were private. So I made all those private functions public. The problem is that I can't find any BitBlt parameter that will just add pixel values together.