Examples: Refactored directx11_example to be easier to copy & paste into user application.

examples/directx11_example/imgui_impl_dx11.h

@@ -0,0 +1,17 @@
+// ImGui Win32 + DirectX11 binding
+// https://github.com/ocornut/imgui
+
+struct ID3D11Device;
+struct ID3D11DeviceContext;
+
+bool        ImGui_ImplDX11_Init(void* hwnd, ID3D11Device* device, ID3D11DeviceContext* device_context);
+void        ImGui_ImplDX11_InitFontsTexture();
+void        ImGui_ImplDX11_Shutdown();
+void        ImGui_ImplDX11_NewFrame();
+
+// Handler for Win32 messages, update mouse/keyboard data.
+// You may or not need this for your implementation, but it can serve as reference for handling inputs.
+// Commented out to avoid dragging dependencies on <windows.h> types. You can copy the extern declaration in your code.
+/*
+extern LRESULT   ImGui_ImplDX11_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
+*/