Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

How to avoid "Illegal to call out while in message filter"

Posted on 1998-05-01
2
Medium Priority
?
2,787 Views
Last Modified: 2012-05-04
I have a VB app calling methods in an object created in an .EXE automation server (written in C++ MFC).  Two different VB forms are accessing two different objects in the same .EXE server.  In general, things work fine, but I seem to get occasional collisions when both VB forms are accessing the server and one reports an automation error 0x8001005 ("Illegal to call out while inside message filter").  The one reporting the error is being wakened by a timer to make periodic calls (which work most of the time).  How is this caused and can it be avoided?
0
Comment
Question by:dho050198
2 Comments
 
LVL 6

Expert Comment

by:anthonyc
ID: 1436500
sounds like a threading problem in the C++
0
 
LVL 2

Accepted Solution

by:
woka earned 300 total points
ID: 1436501
Check out articles Q176399 and Q138063 in the Microsoft knowledge base for some enlightenment about timers and the windows message queue and RPC in out of process servers.  You can use the timer, but you have to set some flags to avoid re-entrancy.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

There are many ways to remove duplicate entries in an SQL or Access database. Most make you temporarily insert an ID field, make a temp table and copy data back and forth, and/or are slow. Here is an easy way in VB6 using ADO to remove duplicate row…
Since upgrading to Office 2013 or higher installing the Smart Indenter addin will fail. This article will explain how to install it so it will work regardless of the Office version installed.
Get people started with the process of using Access VBA to control Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…
This lesson covers basic error handling code in Microsoft Excel using VBA. This is the first lesson in a 3-part series that uses code to loop through an Excel spreadsheet in VBA and then fix errors, taking advantage of error handling code. This l…
Suggested Courses

877 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question