diff --git a/OpenGLRenderer/OpenGLRenderer.vcxproj b/OpenGLRenderer/OpenGLRenderer.vcxproj
index 1f0123c..7f6cc98 100644
--- a/OpenGLRenderer/OpenGLRenderer.vcxproj
+++ b/OpenGLRenderer/OpenGLRenderer.vcxproj
@@ -113,7 +113,7 @@
     <Link>
       <SubSystem>Windows</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
-      <AdditionalLibraryDirectories>D:\App Files\Projects\OpenGLTest\OpenGLRenderer\include;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>C:\git\OpenGLTest\OpenGLRenderer\include;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
       <AdditionalDependencies>opengl32.lib;glew32.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <NoEntryPoint>
       </NoEntryPoint>
diff --git a/OpenGLRenderer/main.cpp b/OpenGLRenderer/main.cpp
index 13bca07..4c37863 100644
--- a/OpenGLRenderer/main.cpp
+++ b/OpenGLRenderer/main.cpp
@@ -1,4 +1,3 @@
-
 #include "main.h"
 #include <iostream>
 HGLRC hRC;
@@ -95,7 +94,7 @@ DLL_API void RenderFrame()
 	SwapBuffers(wglGetCurrentDC());
 }
 
-DLL_API void SetupViewport(unsigned int width, unsigned int height)
+DLL_API void SetupViewport(int width, int height)
 {	
 	VIEWPORT_WIDTH = width;
 	VIEWPORT_HEIGHT = height;
diff --git a/OpenGLRenderer/main.h b/OpenGLRenderer/main.h
index ded5ded..fa3bc1e 100644
--- a/OpenGLRenderer/main.h
+++ b/OpenGLRenderer/main.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#define DLL_API __declspec(dllexport)
+#define DLL_API extern "C" __declspec(dllexport)
 
 #include <windows.h>
 #include "include/headers/glew.h"
@@ -12,6 +12,6 @@ extern "C" {
 
     DLL_API void InitializeOpenGL(HWND hWnd);
     DLL_API void RenderFrame();
-    DLL_API void SetupViewport(unsigned int width, unsigned int height);
+    DLL_API void SetupViewport(int width, int height);
     //DLL_API void Cleanup();
 }
\ No newline at end of file
diff --git a/OpenGLTest/Form1.cs b/OpenGLTest/Form1.cs
index f7fd92a..dc8fbcd 100644
--- a/OpenGLTest/Form1.cs
+++ b/OpenGLTest/Form1.cs
@@ -19,12 +19,16 @@ namespace OpenGLTest
         public static extern uint RenderFrame();
 
         [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
-        public static extern uint SetErrorCallback(GLErrorCallbackDelegate errorCallbackDelegate);
+        public static extern uint SetupViewport(int width, int height);
+
+        [DllImport(DllPath, CallingConvention = CallingConvention.Cdecl)]
+        public static extern uint SetGLErrorCallback(GLErrorCallbackDelegate errorCallbackDelegate);
 
         public Form1()
         {
             InitializeComponent();
-            SetErrorCallback(HandleError);
+            SetGLErrorCallback(HandleError);
+            SetupViewport(panel1.Width, panel1.Height);
         }
 
         private static void HandleError(uint errorCode, string errorMessage)