Help with linking. Quite new at c++.

[KipDotJpg]

I'm having difficulty figuring out how to resolve linking errors. The error code is:

1>imgui_impl_dx12.obj : error LNK2019: unresolved external symbol _CreateDXGIFactory1@8 referenced in function "bool _cdecl ImGui_ImplDX12_CreateDeviceObjects(void)" (?ImGui_ImplDX12_CreateDeviceObjects@@YA_NXZ)
1>main.obj : error LNK2001: unresolved external symbol CreateDXGIFactory1@8
1>main.obj : error LNK2019: unresolved external symbol D3D12CreateDevice@16 referenced in function "bool cdecl CreateDeviceD3D(struct HWND *)" (?CreateDeviceD3D@@YA_NPAUHWND@@@z)
1>main.obj : error LNK2019: unresolved external symbol D3D12GetDebugInterface@8 referenced in function "bool cdecl CreateDeviceD3D(struct HWND *)" (?CreateDeviceD3D@@YA_NPAUHWND@@@z)
1>main.obj : error LNK2019: unresolved external symbol _DXGIGetDebugInterface1@12 referenced in function "void __cdecl CleanupDeviceD3D(void)" (?CleanupDeviceD3D@@yaxxz)

I am not familiar with linking as a concept, and I would appreciate any help with understanding what I'm supposed to do and what it means. Thanks.

I know any help will need more information, I'm just not sure what to provide.

Edit:
I have since changed to dx12 to attempt to fix some issues, but I am having a very similar issue thus far.

[ocornut]

What build system are you using?

Libraries eg Dx11 needs a specific .lib file linked into your project, eg d3d11.lib for Dx11. If you google for the terms you are discussing here you will find references.

[ocornut]

If you search for Direct3DCreate9 the doc is at https://learn.microsoft.com/en-us/windows/win32/api/d3d9/nf-d3d9-direct3dcreate9 and at the bottom of it says the function is declared in d3d9.h (the header) and implemented in d3d9.lib (the library to link).

how to specify which library to link would depends on your compiler and build system and I am sure there are ample info about it on the internet.

[KipDotJpg]

Thank you! I feel a bit silly as I now realise I missed that section in the how to section. I appreciate the civility you responded with, even though the question was a bit silly.