Update Usage03.md

ericremoreynolds · ericremoreynolds · commit 45d30afc1f5b · 2014-11-13T16:19:41.000+01:00
diff --git a/docs/tutorials/Usage03.md b/docs/tutorials/Usage03.md
@@ -13,15 +13,17 @@ def MyFunction(x, y):
 
 The following VBA code can be used to call this function, taking the input parameters from a worksheet and pasting the outputs back to that sheet.
 
-    Sub CallPythonCode()
-        Set res = Py.Call( _
-            Py.Module("MyScript"), "MyFunction", _
-            Py.Dict( _
-                "x", Sheet1.Range("A1").Value2, _
-                "y", Sheet1.Range("A2").Value2))
-        Sheet1.Range("A3").Value2 = Py.Var(Py.GetItem(res, "sum"))
-        Sheet1.Range("A4:B4").Value2 = Py.Var(Py.GetItem(res, "sorted"))
-    End Sub
+```vb.net
+Sub CallPythonCode()
+    Set res = Py.Call( _
+        Py.Module("MyScript"), "MyFunction", _
+        Py.Dict( _
+            "x", Sheet1.Range("A1").Value2, _
+            "y", Sheet1.Range("A2").Value2))
+    Sheet1.Range("A3").Value2 = Py.Var(Py.GetItem(res, "sum"))
+    Sheet1.Range("A4:B4").Value2 = Py.Var(Py.GetItem(res, "sorted"))
+End Sub
+```
 
 The calls to `Py.Module` and `Py.Call` have been explained above. Once the result dictionary is obtained from the function, its elements can be accessed using `Py.GetItem`.
 
