add d3d9 project structure

GDP/D3D9/Utilities.h

@@ -0,0 +1,27 @@
+#pragma once
+#include <Windows.h>
+#include <string>
+
+void ShowError(UINT error);
+
+#define CheckError(x) if (x != 0) \
+{ \
+	ShowError(x); \
+	return x; \
+}
+
+#define CheckFailed(hr, x) if (FAILED(hr)) \
+{ \
+	ShowError(x); \
+	return x; \
+}
+
+template<typename T>
+void safeRelease(T*& obj)
+{
+	if (obj != nullptr)
+	{
+		obj->Release();
+		obj = nullptr;
+	}
+}