DirectX: How to get right frame? - c++

Question

I want to capture desktop on which there is an stereo app.
My code
IDirect3D9 *d3d = nullptr;
IDirect3DDevice9* device = nullptr;
IDirect3DSurface9 *surfaceMono = nullptr, *surfaceLeft=nullptr,
*surfaceRight=nullptr, *surfaceFront=nullptr;
D3DDISPLAYMODE mode;
D3DPRESENT_PARAMETERS parameters;
ZeroMemory(&mode, sizeof(mode));
ZeroMemory(&parameters, sizeof(parameters));
HRESULT result=S_OK;`
d3d = Direct3DCreate9(D3D_SDK_VERSION);
result = d3d->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &mode);
parameters.Windowed = true;
parameters.BackBufferCount = D3DPRESENT_BACK_BUFFERS_MAX;
parameters.BackBufferHeight = mode.Height;
parameters.BackBufferWidth = mode.Width;
parameters.SwapEffect = D3DSWAPEFFECT_FLIP;
parameters.hDeviceWindow = NULL;
parameters.Flags = D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;
result = d3d->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, NULL,D3DCREATE_HARDWARE_VERTEXPROCESSING, &parameters, &device);
result = device->CreateOffscreenPlainSurface(mode.Width, mode.Height, D3DFMT_A8R8G8B8, D3DPOOL_SYSTEMMEM, &surfaceMono, nullptr)
result = device->CreateOffscreenPlainSurface(mode.Width, mode.Height, D3DFMT_A8R8G8B8, D3DPOOL_SYSTEMMEM, &surfaceLeft, nullptr)
result = device->CreateOffscreenPlainSurface(mode.Width, mode.Height, D3DFMT_A8R8G8B8, D3DPOOL_SYSTEMMEM, &surfaceRight, nullptr)
result = device->CreateOffscreenPlainSurface(mode.Width,mode.Height, D3DFMT_A8R8G8B8, D3DPOOL_SYSTEMMEM, &surfaceFront, nullptr)
result = device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &surfaceMono);
result = D3DXSaveSurfaceToFile(FilePathMono, D3DXIFF_PNG, surfaceMono, NULL, NULL);
result = device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_LEFT, &surfaceLeft);
result = D3DXSaveSurfaceToFile(FilePathLeft, D3DXIFF_PNG, surfaceLeft, NULL, NULL);
result = device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_RIGHT, &surfaceRight);
result = D3DXSaveSurfaceToFile(FilePathRight, D3DXIFF_PNG, surfaceRight, NULL, NULL);
result = device->GetFrontBufferData(0,surfaceFront);
result = D3DXSaveSurfaceToFile(FilePathFront, D3DXIFF_PNG, surfaceFront, NULL, NULL);`
In my output I get empty back buffers and only left frame in front.
I've tried to capture frames in loop and increase CreateOffscreenPlainSurface but it didn't help.
How do I get the right frame?
(win 7,quadro,3d vision)