Window copying works for the most part. Tested on brain.

include/sharpsoft/global_misc.hpp

@@ -3,6 +3,10 @@
 #include "sharpsoft/basic_types.hpp"
 #include "sharpsoft/window_types.hpp"
 
+#define SHARPSOFT_INTERNAL
+#include "internal.hpp"
+#undef SHARPSOFT_INTERNAL
+
 namespace sharp
 {
     constexpr int screen_width = 480, screen_height = 240;
@@ -21,6 +25,13 @@ namespace sharp
     void re_initialize(const global_properties& flags);
     bool is_initialized();
 
+    template<typename T>
+    void add_window(T window)
+    {
+        static_assert(std::is_base_of<window_base, T>::value);
+        internal::add_window(&window, sizeof(T));
+    }
+
     void start();
     void end();
     bool is_started();

include/sharpsoft/internal.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#ifdef SHARPSOFT_INTERNAL
+#include "window_types.hpp"
+
+namespace sharp
+{
+    namespace internal
+    {
+        void add_window(window_base* win_ptr, size_t size);
+    }
+}
+#endif

include/sharpsoft/window_types.hpp

@@ -18,6 +18,9 @@ namespace sharp
     protected:
         window_base(const std::string& title, const int2& pos, const int2& size);
 
+#ifdef SHARPSOFT_INTERNAL
+    public:
+#endif
         virtual void paint() = 0;
 
     public:

project.pros

@@ -398,7 +398,8 @@
       }
     },
     "upload_options": {
-      "description": "Demo project for Sharpsoft. Currently contains the library's code. May be moved elsewhere in the future."
+      "description": "Demo project for Sharpsoft. Currently contains the library's code. May be moved elsewhere in the future.",
+      "slot": 3
     },
     "use_early_access": true
   }

src/main.cpp

@@ -5,18 +5,20 @@
 // Including `using namespace sharp;` is not recommended.
 
 class test_window : public sharp::window_base
-{
+{	
 protected:
 	void paint() override
 	{
-
+		printf("Printed: %d", test_variable);
 	}
 
 public:
     test_window() : window_base("Testing", sharp::int2(10, 10), sharp::int2(150, 100))
     {
-        
+		
     }
+
+	int test_variable;
 };
 
 void initialize()
@@ -25,7 +27,9 @@ void initialize()
 	sharp::initialize();
 
 	test_window moment = test_window();
+	moment.test_variable = 3;
 
+	sharp::add_window(&moment);
 	sharp::start();
 }
 

src/sharpsoft/global_manager.cpp

@@ -1,6 +1,12 @@
+#define SHARPSOFT_INTERNAL
+
+#include <string.h>
+#include <vector>
 #include "sharpsoft/global_misc.hpp"
+#include "sharpsoft/internal.hpp"
 
 using namespace sharp;
+using std::vector;
 
 const global_properties global_properties::defaults =
 {
@@ -11,6 +17,8 @@ bool init = false;
 bool started = false;
 color back_col;
 
+vector<window_base*> windows;
+
 void sharp::initialize()
 {
     if (init) return;
@@ -57,6 +65,21 @@ bool sharp::is_initialized()
     return init;
 }
 
+void sharp::internal::add_window(window_base* win_ptr, size_t size)
+{
+    void* copy_raw = malloc(size);
+    memcpy(copy_raw, (void*)(win_ptr), size);
+
+    window_base* copy = (window_base*)copy_raw;
+    windows.push_back(copy);
+}
+
+void sharp::test()
+{
+    window_base* item = windows.at(0);
+    item->paint();
+}
+
 void sharp::start()
 {
     if (!init || started) return;