imgui/examples/imgui_impl_dx9.h

// ImGui Renderer for: DirectX9
// This needs to be used along with a Platform Binding (e.g. Win32)

// Implemented features:
//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.

// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui

struct IDirect3DDevice9;

IMGUI_IMPL_API bool     ImGui_ImplDX9_Init(IDirect3DDevice9* device);
IMGUI_IMPL_API void     ImGui_ImplDX9_Shutdown();
IMGUI_IMPL_API void     ImGui_ImplDX9_NewFrame();
IMGUI_IMPL_API void     ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data);

// Use if you want to reset your rendering device without losing ImGui state.
IMGUI_IMPL_API void     ImGui_ImplDX9_InvalidateDeviceObjects();
IMGUI_IMPL_API bool     ImGui_ImplDX9_CreateDeviceObjects();