LockRectangle error

[EFileTahi-A]

I simply cant 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. Ive 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 its 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