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Present not displaying surfaces

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Hi All, I have created a surface using CreateOffScreenPlainSurface and am trying to present it on the screen. But, I am not able to do so. I am not sure what is wrong with my code. Please help. Below are some code snippets: Creation of surface
if ( FAILED(d3dDevice->CreateOffscreenPlainSurface(800, 800, D3DFMT_X8R8G8B8, D3DPOOL_DEFAULT, &Surface, NULL))
   return E_FAIL;
D3DCOLOR Color1 = 0xFF00FF;
Presenting the surface
d3dDevice->GetBackBuffer(0,0,D3DBACKBUFFER_TYPE_MONO, &pBackBuffer);
d3dDevice->BeginScene() ;		{
d3dDevice->Present( NULL, NULL, NULL, NULL );

Thank You.

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For ColorFill to work, the surface has to be in D3DPOOL_DEFAULT, but for UpdateSurface, the source surface must be in D3DPOOL_SYSTEMMEMORY. The D3D debug runtime (and the docs of course) will give hints when these things happen.


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Thanks EviSteve and VizOne.

I see that if I use StretchRect instead of UpdateSurface, I can copy the surface onto the backbuffer.

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