Click here to Skip to main content
11,920,394 members (57,062 online)
Rate this:
Please Sign up or sign in to vote.
See more: VB Visual-Studio VS2010 , +
A first question post from a novice programmer... any help appreciated:

I have developed a com visible UserControl in VB.NET (VS2010). It works fine but when built it gives me a series of warnings similar to:

Type library exporter warning processing ..... Warning: Non COM visible value type 'System.Windows.Forms.AutoSizeMode' is being referenced either from the type currently being exported or from one of its base types.

I have Imports System.Windows.Forms and my UserControl makes use of several controls such as Label, RTB etc.

Done lots of web searching on this but not finding a solution I can make sense of!

Any pointers please?

Posted 25-Jan-12 1:28am
Edited 25-Jan-12 23:14pm
Lakamraju Raghuram 26-Jan-12 9:28am
Is the assembly and all other required types are set as COM visible
kmf 26-Jan-12 10:51am
Thanks Lakamraju, I have selected 'Register for COM Interop' and 'Make assembly COM visible' in my project properties. I am not sure if that is enough though. I am testing with just one class, a UserControl, in the project and defined as:
<ProgId("myProgName"), ClassInterface(ClassInterfaceType.AutoDual), Guid("2******guid_here")> _
Public Class myClassName
kmf 27-Jan-12 10:32am
It appears I only get these warninging with ClassInterfaceType set to AutoDual. If I use either AutoDispatch or None there are no warnings. I am learning a bit about the differences now. AutoDual is 'strongly discouraged'! ...

1 solution

Rate this: bad
Please Sign up or sign in to vote.

Solution 1

Have you gone into your project properties, Compile tab, and checked "Register for COM interop"??
kmf 26-Jan-12 10:51am
Thanks Dave, as you will see from my previous comment I do have this selected.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

  Print Answers RSS
0 OriginalGriff 415
1 phil.o 170
2 Dave Kreskowiak 155
4 F-ES Sitecore 130
0 OriginalGriff 6,778
1 KrunalRohit 4,495
2 Sergey Alexandrovich Kryukov 3,203
3 George Jonsson 2,805
4 Suvendu Shekhar Giri 2,181

Advertise | Privacy | Mobile
Web02 | 2.8.151120.1 | Last Updated 26 Jan 2012
Copyright © CodeProject, 1999-2015
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100