Form shows not up as child

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MIDI

Hi,

I'm trying to set up a Midi application. I've got a MID-Form and some other forms which should show up as children.

But Calling the show() method (after setting childform.mdiparent to the Mid-Form) does not result in the desired effect. They show modal/ as popup.

If I just instance a blank form, this works.

Is there any property to put attention to or something else that prevents a form from being shwoed as child?

Many thanks