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    When I comment out the line of code calling Direct3DCreate9 I expect there to be linker errors with all the other D3D calls on the Direct3DDevice itself. But once I comment that one line out, there are no issues with compiling. I am using Visual Studio 2015 on Windows 10.
    Type: IDirect3D9 * If successful, this function returns a pointer to an IDirect3D9 interface; otherwise, a NULL pointer is returned. The Direct3D object is the first Direct3D COM object that your graphical application needs to create and the last object that your application needs to release.
    Direct3D Functions The Direct3DCreate9Ex function (d3d9.h) creates an IDirect3D9 object and return an interface to it.
    There are many possible causes for this problem, from missing drivers and bad launch settings to disabled graphics services. Here is how you deal with these issues and fix this error. The most common reason for getting a failed to create D3D device error is if your graphics services are not working.
  2. 外部シンボルエラーの解決(Direct3DCreate9) #Windows - Qiita

  3. Windows 11/10のDirectXエラーを修正 - The Windows Club Blog

  4. D3D11CreateDeviceでのエラー[ DirectX ... - Qiita