Examples: SDL2 (all), SDL3 (all), Win32+OpenGL3: Rework examples main loop to handle minimization without burning CPU or GPU by running unthrottled code. (#7844)

examples/example_win32_opengl3/main.cpp

@@ -108,6 +108,11 @@ int main(int, char**)
         }
         if (done)
             break;
+        if (::IsIconic(hwnd))
+        {
+            ::Sleep(10);
+            continue;
+        }
 
         // Start the Dear ImGui frame
         ImGui_ImplOpenGL3_NewFrame();