Examples: Amend Win32/Winapi + OpenGL example. (#3218, #5170 and #6086, #2772, #2600, #2359, #2022, #1553)

docs/CHANGELOG.txt

@@ -48,8 +48,12 @@ Other changes:
   (#6341) [@lukaasm]
 - Backends: Clear bits sets io.BackendFlags on backend Shutdown(). (#6334, #6335] [@GereonV]
   Potentially this would facilitate switching runtime backend mid-session.
+- Backends: Win32: Added ImGui_ImplWin32_InitForOpenGL() to facilitate combining raw
+  Win32/Winapi with OpenGL. (#3218)
 - Backends: OpenGL3: Restore front and back polygon mode separately when supported
   by context (Desktop 3.0, 3.1, or 3.2+ with compat bit). (#6333) [@GereonV]
+- Examples: Added native Win32+OpenGL3 example. We don't recommend using this setup but we
+  provide it for completeness. (#3218, #5170, #6086, #2772, #2600, #2359, #2022, #1553) [@learn-more]
 
 
 

docs/EXAMPLES.md

@@ -200,6 +200,10 @@ DirectX12 example, Windows only. <BR>
 = main.cpp + imgui_impl_win32.cpp + imgui_impl_dx12.cpp <BR>
 This is quite long and tedious, because: DirectX12.
 
+[example_win32_opengl3/](https://github.com/ocornut/imgui/blob/master/examples/example_win32_opengl3/) <BR>
+Raw Windows + OpenGL3 + example (modern, programmable pipeline) <BR>
+= main.cpp + imgui_impl_win32.cpp + imgui_impl_opengl3.cpp <BR>
+
 
 ### Miscellaneous