>>My forms are not dockable so I have no experience here. My MDI form is borderless and no titlebar and I control its placement and it is not movable. I think the dockable form is always on top and this would be an issue with any child form over it. You might try turning off the Dockable property when the child form is created (set to zero) and then set back when the child form is closed.
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>Thank you for the suggestion, Greg, but the point is precisely to give some autonomy to users and let them arrange (even by grouping / docking) the different forms in the application the way they prefer.
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>Meanwhile, while trying with FoxyPreviewer I noticed that the settings form was placed over the docked and dockable forms. I checked the source, and declaring a modal form as a Desktop window has the effect I was looking for.
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>I'll have to check for secondary effects, now.

Hi Antonio,

Following this thread I think the only chance is to set the DESKTOP property of your (modal) form to .T.
Like the DEBUG works