Hi. I have a very strange problem. I've never get in this situation as only now. So, my app is d3dx9, device is created with CreateDeviceEx (hardware vertex processing, 800x600, 1 backbuffer and windowed). There is no problem. Backbuffer format is X8R8G8B8. When i'm creating texture with CreateTexture(256,256,1,0,D3DFMT_A8R8G8B8, D3DPOOL_MANAGED, &pTexture,NULL). And failed with error: INVALID CALL. If i'm replacing D3DPOOL_MANAGED to D3DPOOL_DEFAULT, it's ok but failed when i'm doing pTexture->LockRect(0, &rcRect, NULL, 0); I've never get this error in previos directx 8. So, i found a way to lock - using D3DPOOL_SYSTEMMEM. But then failed DrawPrimitive with E_FAIL and exception (long memory call or smt.). I don't have any ideas what can be wrong, so please, help. Thanks!

You probably want the usage flag DYNAMIC.

Oh, it helps.

Thanks!