How to threading data in app?

[tanthinh1510]

Finding the window, getting and releasing a DC and calling send_data_channel for every loop iteration looks really wasteful.

Cheers,
_

I just do not call these functions, better results but still not solved the problem.
I test and realized that GetPixel(dc, _x, _y ) is time-consuming. So when I put 500 - 1000 rectangle, I had 500 -1000 object in list and take a long time to process.
however I only 30ms to process all.

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Added after 4 minutes:

If color of an object depends on this object's position, can't you simply ask the object what color it has instead of using this hacky WinAPI approach?

I get color pixel screen from object's position. I used WinAPI approach to get it. Anything approach?