Add mouse cursor handling

GpCommon/GpColorCursor_Win32.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "IGpColorCursor.h"
+#include "GpWindows.h"
+
+class GpColorCursor_Win32 final : public IGpColorCursor
+{
+public:
+	void Destroy() override;
+
+	const HCURSOR &GetHCursor() const;
+
+	void IncRef();
+	void DecRef();
+
+	static GpColorCursor_Win32 *Load(const wchar_t *path);
+
+private:
+	GpColorCursor_Win32(HCURSOR cursor);
+	~GpColorCursor_Win32();
+
+	HCURSOR m_cursor;
+	int m_refCount;
+};