Missing automatic ToolTip in label with AutoEllipsis = true

[stefanome]

I created a standalone WinForms application, put a label on a form, set AutoSize=false, AutoEllipsis=true, Text="something long" and Width=30, ran the application and the form showed only the first few letters of the text followed by 3 dots. I hovered the mouse pointer over the label and a tooltip showed the whole text.

I created a similar form in a Revit add-in project, created a command that opens it, and the automatic tooltip doesn't show up.

Any idea why?

Is it because the former is the application form, while the latter is... another kind of form?

[jeremy_tammik]

No clear idea why, except that Revit maybe messes around with certain Windows settings required for its own user interface that end up interfering with your tooltip settings. Sorry about that!