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Asked: 2026-05-10T16:23:55+00:00

I have a Windows Form app written in C#. Its job is to send

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I have a Windows Form app written in C#. Its job is to send messages to a list of users. While those messages are being sent, I’d like to display status of the operation for each user. What I am doing (for each user) is creating a Label control and adding it to Panel. This works without a problem for a small set of users. When I increase the size to 1000 or more, the Visual Studio Debugger displays the following message:

A first chance exception of type ‘System.ComponentModel.Win32Exception’ occurred in System.Windows.Forms.dll A first chance exception of type ‘System.Reflection.TargetInvocationException’ occurred in mscorlib.dll

And then the application hangs. Any thoughts on what I’m doing wrong and how I can fix this?

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1 Answer

  1. Given the size, I would consider displaying your status in a RichTextBox.

    What is happening is that you are generating too many handles and the Framework can’t handle them all.

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