Examples: GL3: Comments about gl3w (#880)

examples/opengl3_example/imgui_impl_glfw_gl3.cpp

@@ -10,7 +10,7 @@
 #include "imgui_impl_glfw_gl3.h"
 
 // GL3W/GLFW
-#include <GL/gl3w.h>
+#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions (because it is small). You may use glew/glad/glLoadGen/etc. whatever already works for you.
 #include <GLFW/glfw3.h>
 #ifdef _WIN32
 #undef APIENTRY

examples/opengl3_example/main.cpp

@@ -4,7 +4,7 @@
 #include <imgui.h>
 #include "imgui_impl_glfw_gl3.h"
 #include <stdio.h>
-#include <GL/gl3w.h>
+#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions (because it is small). You may use glew/glad/glLoadGen/etc. whatever already works for you.
 #include <GLFW/glfw3.h>
 
 static void error_callback(int error, const char* description)

examples/sdl_opengl3_example/imgui_impl_sdl_gl3.cpp

@@ -12,7 +12,7 @@
 // SDL,GL3W
 #include <SDL.h>
 #include <SDL_syswm.h>
-#include <GL/gl3w.h>
+#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions (because it is small). You may use glew/glad/glLoadGen/etc. whatever already works for you.
 
 // Data
 static double       g_Time = 0.0f;

examples/sdl_opengl3_example/main.cpp

@@ -4,7 +4,7 @@
 #include <imgui.h>
 #include "imgui_impl_sdl_gl3.h"
 #include <stdio.h>
-#include <GL/gl3w.h>
+#include <GL/gl3w.h>    // This example is using gl3w to access OpenGL functions (because it is small). You may use glew/glad/glLoadGen/etc. whatever already works for you.
 #include <SDL.h>
 
 int main(int, char**)