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Hi,
Please refer once our recommended articles(resides right-side of this thread)...
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Yes, if you are writing a graphical application such as you are then you need to learn about graphics programming in Windows.
In Windows, there is something called a paint event. Graphical programs draw graphics in the paint event. You can do something such as draw into a picture box control and then the control will take care of the paint event. You should learn about things like that. The articles in this web site will help you and you might want to get a good book too for learning.