Moved direct WinAPI access into a service

Eve-O-Preview/DwmAPI/Interface/IWindowManager.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace EveOPreview
+{
+	public interface IWindowManager
+	{
+		bool IsCompositionEnabled { get; }
+
+		IntPtr GetForegroundWindowHandle();
+
+		void ActivateWindow(IntPtr handle);
+		void DeactivateWindow(IntPtr handle);
+
+		void MoveWindow(IntPtr handle, int left, int top, int width, int height);
+		void GetWindowCoordinates(IntPtr handle, out int left, out int top, out int right, out int bottom);
+	}
+}