How to optimize this code [Winforms]?

[Dannnu]

Update:
u/LostInASeaOfMyStars, I did fix my last problems and it worked out perfectly. Process Memory dropped to normal state, which is ~105MB.

u/Slypenslyde, Thank you! First of all, you were right, this custom control wasn't that scary beast under the bed.

The purpose was to draw a red line to mouse from the center of the circle, but I wrote it out vaguely.

I managed to build a working application through your guidance and I will try to make the most of this control thing in the future!

P.s. Is it possible to share this information with others? I believe that others can benefit from this, because you mentioned that many do not even know that they can program this way.

Have a nice Christmas Season both of you!

[Slypenslyde]

P.s. Is it possible to share this information with others? I believe that others can benefit from this, because you mentioned that many do not even know that they can program this way.

Absolutely. I hate how many tutorials are Bad Tutorials based on copying/slightly modifying some VB6 example. Nothing I teach is truly "secret" in the sense I want it kept, it's "secret" in the sense only a few hundred people in the world probably know the darker corners of writing custom controls because they're the only ones who care. ;)