IMGUI通读四：例子

 HOW A SIMPLE APPLICATION MAY LOOK LIKE:
 EXHIBIT 1: USING THE EXAMPLE BINDINGS (imgui_impl_XXX.cpp files from the examples/ folder).

     // Application init: create a dear imgui context, setup some options, load fonts
     ImGui::CreateContext();
     ImGuiIO& io = ImGui::GetIO();
     // TODO: Set optional io.ConfigFlags values, e.g. 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard' to enable keyboard controls.
     // TODO: Fill optional fields of the io structure later.
     // TODO: Load TTF/OTF fonts if you don't want to use the default font.

     // Initialize helper Platform and Renderer bindings (here we are using imgui_impl_win32 and imgui_impl_dx11)
     ImGui_ImplWin32_Init(hwnd);
     ImGui_ImplDX11_Init(g_pd3dDevice, g_pd3dDeviceContext);

     // Application main loop
     while (true)
     {
         // Feed inputs to dear imgui, start new frame
         ImGui_ImplDX11_NewFrame();
         ImGui_ImplWin32_NewFrame();
         ImGui::NewFrame();

         // Any application code here
         ImGui::Text("Hello, world!");

         // Render dear imgui into screen
         ImGui::Render();
         ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());
         g_pSwapChain->Present(1, 0);
     }

     // Shutdown
     ImGui_ImplDX11_Shutdown();
     ImGui_ImplWin32_Shutdown();
     ImGui::DestroyContext();