I have run into a weird problem; I'm making a C# Outlook addin, register a
form region on HKCU, so far so good.

I did then a refactor in code, and I have changed the form name (the string
used for GetFormRegionManifest etc. of FormRegionStartup).
Everything is ok, *but* notice in the following manifest (I am pasting the
full manifest content at the end of the message)
after the section
!-- exactMessageClassfalse/exactMessageClass --s
there is an extra 's' character, which obviously is not correct.

The manifest is embedded in addin as a resource
(Properties.Resources.DetailsUrlRegion_manifest in the code below)
and returned to Outlook using:
....
public object GetFormRegionManifest(string FormRegionName,
int LCID) {
Debug.WriteLine(" GetFormRegionManifest: FormRegionName=" +
FormRegionName);
if (FormRegionName == "DLC.DetailsUrl") {
Debug.WriteLine("MANIFEST:\r\n============\r\n" +
Properties.Resources.DetailsUrlRegion_manifest + "\r\n============\r\n");
return Properties.Resources.DetailsUrlRegion_manifest;
}
return null;
}
....

If I add more characters after the rogue 's', it's still ok.
If I delete the 's', GetFormRegionManifest is still called (obviously), but
the form region does not load (i.e. GetFormRegionStorage is not called).

Even more, if I revert the order of lines
!-- exactMessageClassfalse/exactMessageClass --s
formRegionTypeadjoining/formRegionType
into
formRegionTypeadjoining/formRegionType
!-- exactMessageClassfalse/exactMessageClass --s
the region again does *not* load.

I have cleared the FRMCACHE.DAT (although I don't think it has to do
something with it...), but I suspect that is either an XML encoding thing
(the file is UTF-8 with signature - Codepage 65001, Line endings - Current
setting, Windows CRLF), or how the resource is loaded from file - something
related to this.
Or Outlook keeps the original (incorrect?) manifest and compares with the
actual content and does not hit - I'm really fishing in muddy waters here.

Anyways, if someone see this and sounds familiar, please drop me a direction
since the actual solution (to let the incorrect XML file...) is way too
random to be called a solution, and no internet search hits something
similar.

Tested on Outlook 2007 en-us, all updates to day, on Windows 7 and Windows
XP (both 64-bit).

Here is the manifest file content (notice the incorrect 's') and which
"works" (i.e. GetFormRegionStorage is called and form region is loaded).

============ START MANIFEST ============
?xml version="1.0" encoding="utf-8"?
FormRegion
xmlns="http://schemas.microsoft.com/office/outlook/12/formregion.xsd"
nameDLC.DetailsUrl/name
formRegionNameDLC Details/formRegionName
titleDetails/title
!-- exactMessageClassfalse/exactMessageClass --s
formRegionTypeadjoining/formRegionType
showInspectorComposefalse/showInspectorCompose
showInspectorReadtrue/showInspectorRead
showReadingPanefalse/showReadingPane
addinOLDlc.Connect/addin
!-- hiddentrue/hidden --
!-- version1.0/version --
icons
!-- icons --
defaultaddin/default
unreadaddin/unread
readaddin/read
repliedaddin/replied
forwardedaddin/forwarded
unsentaddin/unsent
submittedaddin/submitted
signedaddin/signed
encryptedaddin/encrypted
windowaddin/window
recurringaddin/recurring
!-- page --
pageaddin/page
/icons
/FormRegion
============ END MANIFEST ============

Thanks,
Cristian Amarie