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Resizes handled automatically by d3d? (dx8)

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Hi, I noticed in the DX8 d3d tutorials, you can resize the window and nothing wrong appears to happen. The programs use backbuffers, and take no steps whatsoever to prepare for a window resize. In the Direct3D framework though (d3dapp.cpp), after the window is done being resized a new backbuffer is created etc. In d3dapp.cpp, when the d3d device is being created, they set the height and width of the backbuffer explicitly. The tutorial programs do not, so I was wondering, does d3d automatically set a size for them if you don''t specify one? Is there any reason for specifying a size? There doesn''t appear to be any problems, so I was wondering why the framework sets the size explicitly. Thanks, IceGod

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