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Sinan

directdraw

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You need to lock the surface, write bytes to the pointer returned, then unlock it. That means that you also need to write code to draw circles, lines, etc to a memory buffer.

Or use Direct3D in 2D mode, it's far easier, more flexible and most likely faster too.

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If you are familiar with the Windows GDI for drawing shapes in normal windows, you can get a device context for the DirectDraw surface with Surface->GetDC(), draw on it using all the normal GDI functions then call ->ReleaseDC(). This is not particularly fast however.

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