LockRectangle error

[EFileTahi-A]

I simply can't understand why this does not work...

 

Surface s = dxDevice.GetBackBuffer(0, 0, BackBufferType.Mono);
GraphicsStream gs = s.LockRectangle(LockFlags.ReadOnly);

 

It gives me an error when executing the second line of code. I've tryed using many different parameters but, always give me "Error-in-application".

 

Why is this happening?

[PlausiblyDamp]

Have you trie drunning with the debug version of DirectX enabled and getting using it's d3dspy.exe to see what is happening under the hood?

[EFileTahi-A]

Well, I discovered the problem, I needed to add the following lines to the Device Parameters:

 

presentParamsDX1.SwapEffect = SwapEffect.Discard;
presentParamsDX1.EnableAutoDepthStencil = false;
presentParamsDX1.PresentFlag |= PresentFlag.LockableBackBuffer;
presentParamsDX1.MultiSample = MultiSampleType.None;

 

And it works fine :)