support for .NET framework 3.5

Still have bugs

Net35/HandyControl_Net35/Shell/Standard/SW.cs

@@ -0,0 +1,23 @@
+namespace Standard
+{
+    using System;
+
+    internal enum SW
+    {
+        FORCEMINIMIZE = 11,
+        HIDE = 0,
+        MAXIMIZE = 3,
+        MINIMIZE = 6,
+        NORMAL = 1,
+        RESTORE = 9,
+        SHOW = 5,
+        SHOWDEFAULT = 10,
+        SHOWMAXIMIZED = 3,
+        SHOWMINIMIZED = 2,
+        SHOWMINNOACTIVE = 7,
+        SHOWNA = 8,
+        SHOWNOACTIVATE = 4,
+        SHOWNORMAL = 1
+    }
+}
+