473,549 Members | 2,731 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

"Red Cross" - Problem with C# application

I have a C# WinForms Application that contains various "old"
ActiveX-Controls. Due to some unknown reasons recently the "red cross" -
problems appears quite often.

Without any know reason suddenly some controls (buttons, toolbars...) will
be drawn completely white with a red cross inside it.

As I know from other postings this happens if there are exceptions during
the painting of the controls. The call stack shown in the exceptions also
suggests this reasons. Typically the errors read "null reference objects",
"object used elsewhere", "cannot create handle" etc.

Since all these errors happens *outside* my own code, it's impossible to use
a debugger. In fact, in all of that errors no single line of my code is
involved (as shown by the call stack).

As soon as I won't use the "old" ActiceX-controls everything works fine, so
I guess its a problem of the mixture of old and new technology.

Is there any way to handle these problems other than let the .NET runtime
draw a "red cross" ?

Is there any way i can fetch those problems in my code ? How ?

Thank you for any help!
Jul 21 '05 #1
0 1892

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: John Benson | last post by:
Hi, I'm using Tkinter and would like to know how to replace the red "Tk" logo in the left corner of the title bar of the root window with some other icon. Another question for curiosity's sake: I've often seen Tkinter referred to as the "standard" Python GUI. I assume that this is because it may be the oldest and perhaps the most...
by: matt | last post by:
Hi all- I'm trying to port an ajax spell-checker (http://www.broken-notebook.com/spell_checker/index.php) to use with the moin moin wiki and have been somewhat successful. (By successful I mean I can spell check using the php backend and my python port running as cgi-bin). My question is this: moinmoin runs on many python web backends...
by: Walter Quirtmair | last post by:
Hello, I have a C# WinForms Application that contains various "old" ActiveX-Controls. Due to some unknown reasons recently the "red cross" - problems appears quite often. Without any know reason suddenly some controls (buttons, toolbars...) will be drawn completely white with a red cross inside it. As I know from other postings this...
by: RSH | last post by:
I am trying to figure out how I can trap the Closing Event that occurs when a user attempts to close the window by clicking on the red"X". I tried this code which I found online but nothing happens. What do I need to do to trap and give the ability to save changes before the window closes? Thanks, Ron
by: Mesan | last post by:
I'm getting a "Cross-thread operation not valid" Exception and I can't figure out why. I've got a BackgroundWorker that creates a UserControl with a whole lot of other user controls inside of it, full of data I'm getting from the database. When my background worker completes I take e.Result and cast it back into a UserControl. I create a...
by: Pieter | last post by:
Hi, I'm having some weird problem using the BackGroundWorker in an Outlook (2003) Add-In, with VB.NET 2005: I'm using the BackGroundWorker to get the info of some mailitems, and after each item I want to raise the ProgressChanged-event to update the DataGridView. It works fine when only one Progresschanged is fired, but at the second,...
by: Mau Kae Horng | last post by:
Hello, I have a C# Windows Forms application for machine. Due to some unknown reasons, the application face problems with unexpected exceptions happening, resulting in two red lines forming a red cross across a certain control (the entire form, labels and so on). I get the following message in MessageBox.
by: Pieter Coucke | last post by:
Hi, In my VB.NET 2005 application I'm generating and sending emails using the outlook-object model (2003). When a mail is Send (MailObject_Send), I raise an event in a global class, that is caught by all my forms that than refresh the lists with emails. But on the moment I do a MyDataGrid.DataSource = nothing, I get this "Cross-thread...
by: AddAdd | last post by:
i have a form on which we have a bunch of controls when the form is loaded the panels & radio buttons are not displayed but red rectangles with "X" accross them are put in its place. this behavior is not consistent except for on one customer site accross the entire citrix farm & stand alone PCs any help would be appricated thanks
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language...
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. ...
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that...
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For...
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the...
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then...
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes...
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in...
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.