Question

I have an issue with xna and windows forms. I´ve developed a control with xna, and i used that control inside a windows form. My problem begins when i open a new form and it fully covers the control using xna. When that occurs the cpu usage goes to 50% or more and keeps. But if a small part of the xna control is visible the cpu usage goes down to nornal (1-10% more or less, but not more).

Here is the xna parameters configuration

parameters = new PresentationParameters();

            parameters.BackBufferWidth = Math.Max(width, 1);
            parameters.BackBufferHeight = Math.Max(height, 1);
            parameters.BackBufferFormat = SurfaceFormat.Color;
            parameters.DepthStencilFormat = DepthFormat.Depth24;
            parameters.DeviceWindowHandle = windowHandle;
            parameters.PresentationInterval = PresentInterval.Default;
            parameters.IsFullScreen = false;

            graphicsDevice = new GraphicsDevice(GraphicsAdapter.DefaultAdapter,
                                                GraphicsProfile.Reach,
                                                parameters);

Thanks in advance.

pd: it is only happening with windows xp. With windows 7 i have no problems.

Answer 1

Well. I solved the issue.
Don´t know why..but it works.

in your custom drawing code of xna at the end i just write:

Thread.sleep(10);