Lex Li

If possible, can you also share information on the details of your testing environment? What kind of setup is required?

@DaisyDave Thanks. Sounds like it is more related to resource usage, instead of rectangle size. Can you follow Hans Passant's suggestion in https://stackoverflow.com/questions/9362184/how-to-resolve-the-winforms-error-a-generic-error-occurred-in-gdi to check if there is an obvious...

If you need to open a lot of contents, please check out the sample, https://github.com/dockpanelsuite/dockpanelsuite/blob/master/DockSample/MainForm.cs#L472 * `DockPanel.SuspendLayout(true)` * Open the contents * `DockPanel.ResumeLayout(true, true)`

It was reported in the past, but we don't have resources to really fix it, https://github.com/dockpanelsuite/dockpanelsuite/search?q=ArgumentOutOfRangeException&type=Issues Pull requests are welcome.

Please be more specific. If possible, show what you want to achieve by showing a screen shot.

Related to #110 and #225

## Hints for candidates, Create your own fork and start the typical maintenance works, * reviewing commits from PRs and/or other forks * cherry picking what's reasonable into your fork...

I assume this can be made in a custom theme. You can implement your own dock pane strip and change how a tab is measured and rendered. http://docs.dockpanelsuite.com/themes/basics.html#the-structure-of-a-theme

Thanks for sharing the tip.

Without supporting data we can only assume the agent returned a message that was not compliant with the standards.