First of all, do you run it on Win7 or Vista with 7IP? Second, let me make sure my assumptions are correct. You have D3D10 device (shared with D2D) and D3D11 device with feature level 10_0. You create a shared resource on D3D11 device and then open it on D3D10 device and it works fine. Then you call AcquireSync on D3D11 device, call ...

Do I understand correctly that you want to make your application fullscreen with 1024x768 fullscreen resolution? Here's the way to do it in DXGI: 1) Create swapchain with DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH set (otherwise, DXGI won't try to switch desktop resolutions) 2) Call ResizeTarget with DXGI_MODE_DESC with Width = ...