Add COMException changes to CHANGES.md and adjust msoffice demo to fo…

…llow the changes

CHANGES.md

@@ -7,6 +7,7 @@ Release 5.0.0 (Next release)
 
 Features
 --------
+* [#903](https://github.com/java-native-access/jna/pull/903): Carry `HRESULT` in `c.s.j.p.win32.COM.COMException`, introduce `c.s.j.p.win32.COM.COMInvokeException` as subclass of `COMException` for exception as the result of a `IDispatch#Invoke`. The `EXECPINFO` is unwrapped into fields in the `COMInvokeException` and correctly freed. - [@matthiasblaesing](https://github.com/matthiasblaesing).
 * [#822](https://github.com/java-native-access/jna/issues/822): `Native#loadLibrary` requires that the interface class passed in is an instance of Library. The runtime check can be enhanced by using a constraint generic. This breaks binary compatibility (see notes below) - [@d-noll](https://github.com/d-noll).
 * [#889](https://github.com/java-native-access/jna/issues/889): The `Structure#newInstance` receive the target type as a parameter. This adds a limited generic type, so that the return type ist the target type and not a generic structure, removing the necessity to do an explizit cast  - [@matthiasblaesing](https://github.com/matthiasblaesing).
 
@@ -69,6 +70,9 @@ Breaking Changes
 * `com.sun.jna.platform.win32.Kernel32Util.formatMessageFromHR(HRESULT)`
   was replaced by
   `com.sun.jna.platform.win32.Kernel32Util.formatMessage(HRESULT)`
+* `com.sun.jna.platform.win32.COM.COMException` was structurally modified. The
+  `pExcepInfo` and `puArgErr` members were removed and `hresult` member was added.
+  The now missing information in `COMException` was moved to `COMInvokeException`.
 
 Release 4.5.0
 =============

contrib/msoffice/src/com/sun/jna/platform/win32/COM/office/MSOfficeDemo.java

@@ -26,6 +26,7 @@
 import com.sun.jna.Pointer;
 
 import com.sun.jna.platform.win32.COM.COMException;
+import com.sun.jna.platform.win32.COM.COMInvokeException;
 import com.sun.jna.platform.win32.COM.Helper;
 import com.sun.jna.platform.win32.Ole32;
 import com.sun.jna.platform.win32.WinDef.LONG;
@@ -102,11 +103,10 @@ public void testMSWord() throws IOException {
             msWord.insertText("Hello some changes from JNA!\n");            
             // save the document and prompt the user
             msWord.Save(false, wdPromptUser);
+        } catch (COMInvokeException e) {
+            System.out.println("bstrSource: " + e.getSource());
+            System.out.println("bstrDescription: " + e.getDescription());
         } catch (COMException e) {
-            if (e.getExcepInfo() != null) {
-                System.out.println("bstrSource: " + e.getExcepInfo().bstrSource);
-                System.out.println("bstrDescription: " + e.getExcepInfo().bstrDescription);
-            }
         } finally {
             if (msWord != null) {
                 msWord.quit();