How do I make my GUID visible for a VSTO Add-in

Question

I've tried adding the following code to the beginning of my add-in code as such:

Namespace NS
    [Guid("211B3945-E2AE-48DD-8A9A-77ADB40EC6D5")]
    [ComVisible(true)]
    public partial class Classname
    {

but it doesn't appear when I list the COMAddins (the name does, but not the GUID).

I've also tried setting it in my compile settings under Assembly information with no luck.

BTW - the issue I'm trying to resolve is seeing if a COM Addin is loaded by searching for its GUID. The Addin description shows up when I check the list of ComAddIns, but the GUID still shows zeroes no matter how I follow these directions. I'm trying to see what's visible by using the following code:

olApp = this.Application;
Office.COMAddIns CAIs = olApp.COMAddIns;
foreach (Office.COMAddIn CAI in CAIs)
{
    StringBuilder sb = new StringBuilder();
    sb.AppendLine(CAI.Description);
    sb.AppendLine(CAI.Guid);
    sb.AppendLine("****");
    Debug.Print(sb.ToString());
}

Perhaps http://www.office-outlook.com/outlook-forum/index.php/m/667414/ can help you, it mentions retrieving the GUID with VBA. — user247702, Oct 25 '11 at 13:11
I got the code working, but I don't see where it returns the GUID — Larry G. Wapnitsky, Oct 25 '11 at 15:32
Even when I specifically try to print the GUID for this item, I still get all zeroes. — Larry G. Wapnitsky, Oct 25 '11 at 15:36
Thanks, Stijn. I can shoot you my e-mail if you'd like and we can post the final results up here as an answer (if it works ;)) — Larry G. Wapnitsky, Oct 28 '11 at 11:40
Larry, have you found a solution? I am facing the same problem right now. I can identify the add in by its name but would prefer the guid witch is always 00000000-0000-... — Lukas Winzenried, Mar 16 '13 at 22:48

score 1 · Answer 1 · edited May 23 '17 at 12:07

1

There are a number of things missing here to expose COM, including overriding RequestComAddInAutomationService and setting [InterfaceType(ComInterfaceType.InterfaceIsDual)]

See the following items:

edited May 23 '17 at 12:07

Community

1
1

answered Oct 25 '11 at 23:28

Todd Main

28,951
11
82
146

I have code similar to this that I gleaned from an old posting by Ken Slovak, but I'm still getting all zeroes. I can post my code if that will help, but it's multiple files. – Larry G. Wapnitsky Oct 27 '11 at 14:47
2

BTW - the issue I'm trying to resolve is seeing if a COM Addin is loaded by searching for its GUID. The Addin description shows up when I check the list of ComAddIns, but the GUID still shows zeroes no matter how I follow these directions – Larry G. Wapnitsky Oct 27 '11 at 15:10

How do I make my GUID visible for a VSTO Add-in

1 Answers1