diff --git a/src/OpenTK/Platform/Windows/API.cs b/src/OpenTK/Platform/Windows/API.cs
index 434d2987..3c716ba1 100644
--- a/src/OpenTK/Platform/Windows/API.cs
+++ b/src/OpenTK/Platform/Windows/API.cs
@@ -1421,9 +1421,8 @@ namespace OpenTK.Platform.Windows
             }
         }
 
-
         [DllImport("gdi32.dll", SetLastError = true)]
-        internal static extern IntPtr GetStockObject(int index);
+        internal static extern IntPtr GetStockObject(StockObjects fnObject);
 
         [DllImport("gdi32.dll", SetLastError = true)]
         internal static extern BOOL DeleteObject([In]IntPtr hObject);
@@ -3944,6 +3943,33 @@ namespace OpenTK.Platform.Windows
         Baltic = 186,
     }
 
+    /// <summary>
+    /// Identifiers for the GetStockObject method.
+    /// </summary>
+    internal enum StockObjects
+    {
+        WHITE_BRUSH = 0,
+        LTGRAY_BRUSH = 1,
+        GRAY_BRUSH = 2,
+        DKGRAY_BRUSH = 3,
+        BLACK_BRUSH = 4,
+        NULL_BRUSH = 5,
+        HOLLOW_BRUSH = NULL_BRUSH,
+        WHITE_PEN = 6,
+        BLACK_PEN = 7,
+        NULL_PEN = 8,
+        OEM_FIXED_FONT = 10,
+        ANSI_FIXED_FONT = 11,
+        ANSI_VAR_FONT = 12,
+        SYSTEM_FONT = 13,
+        DEVICE_DEFAULT_FONT = 14,
+        DEFAULT_PALETTE = 15,
+        SYSTEM_FIXED_FONT = 16,
+        DEFAULT_GUI_FONT = 17,
+        DC_BRUSH = 18,
+        DC_PEN = 19,
+    }
+
     internal enum MapVirtualKeyType
     {
         /// <summary>uCode is a virtual-key code and is translated into a scan code. If it is a virtual-key code that does not distinguish between left- and right-hand keys, the left-hand scan code is returned. If there is no translation, the function returns 0.</summary>
diff --git a/src/OpenTK/Platform/Windows/WinGLNative.cs b/src/OpenTK/Platform/Windows/WinGLNative.cs
index 79d30b5a..460b24fe 100644
--- a/src/OpenTK/Platform/Windows/WinGLNative.cs
+++ b/src/OpenTK/Platform/Windows/WinGLNative.cs
@@ -727,7 +727,9 @@ namespace OpenTK.Platform.Windows
                     break;
 
                 case WindowMessage.ERASEBKGND:
-                    return new IntPtr(1);
+                    // This is triggered only when the client area changes.
+                    // As such it does not affect steady-state performance.
+                    break;
 
                 case WindowMessage.WINDOWPOSCHANGED:
                     HandleWindowPositionChanged(handle, message, wParam, lParam);
@@ -934,6 +936,8 @@ namespace OpenTK.Platform.Windows
             {
                 ExtendedWindowClass wc = new ExtendedWindowClass();
                 wc.Size = ExtendedWindowClass.SizeInBytes;
+                // Setting the background here ensures the window doesn't flash gray/white until the first frame is rendered.
+                wc.Background = Functions.GetStockObject(StockObjects.BLACK_BRUSH);
                 wc.Style = DefaultClassStyle;
                 wc.Instance = Instance;
                 wc.WndProc = WindowProcedureDelegate;