Since I am a curious person I tried to do it. A D5-application allow me to
create two MDIForms. But the children always go to the mainform if it's an
MDIForm otherwise it raises "cannot create, no mdiforms active" message.
What you are referring to is creating own MDI-handling or some 3rd party
component?
Regards, Fredrik.
meddelande
F: delphi-talk-bounces (AT) elists (DOT) org [mailto:delphi-talk-bounces (AT) elists (DOT) org]
F Stephen Posey
Skickat: den 10 augusti 2005 21:16
Till: Delphi-Talk Discussion List
: Re: MDI frame not main form?
Liz Hundy wrote:
Is it possible to have an MDI form which is not the main form of an
application?
I want to build a form that contains several different views that can be
tiled / cascaded / opened / closed independently. But it will not be the
main form of my application.
Sure, despite the names there's no direct relationship between an
MDI Main Form and the Main Form of an application.
The default VCL code uses the first form created with the
Application object as its owner as Application.MainForm, and if
you've used the MDI Application template, that will indeed be the
MDI MainForm, but you don't have to leave it that way.
Stephen Posey
slposey (AT) concentric (DOT) net
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Fredrik Larsson wrote:

Since I am a curious person I tried to do it. A D5-application allow me to
create two MDIForms. But the children always go to the mainform if it's an
MDIForm otherwise it raises "cannot create, no mdiforms active" message.

What you are referring to is creating own MDI-handling or some 3rd party
component?

Seems I should have tested this before replying.

AFAIK from the Windows API perspective there's no requirement for
an MDI Mainform to be a Windows application's Main Form.

However, there ARE assumptions in the VCL that any MDI form is
the Application.MainForm.
(Look in TCustomForm.CreateWindowHandle).

Since CreateWindowHandle is virtual, it should be possible to
create a descendant that avoids those assumptions; but I don't
have the time/resources at the moment to dig into this much
further, I fear.

Stephen Posey
slposey (AT) concentric (DOT) net

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