How to call a child dialog in a MDI from a Child dialog?

I have an MDI application and I am call child dialogs in the MDI space ok. The problem is that I am callling  another dialog (crystal viiewer) from a mdi child form on one occiasion and it is appearing outside the MDI. So I guess that is a grandchild dialog.

VS-2008 or C#

Thanks Much!
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Mike TomlinsonMiddle School Assistant TeacherCommented:
Since you have MdiChildren that are working properly, I assume you already know how to set the MdiParent Property?
(and that you are setting it for the Crystal Viewer but it's not working?)

Or are you trying to figure out how to open an MdiChild from an existing MdiChild?

    // from an existing MdiChild:
    Form frm = new Form();
    frm.MdiParent = this.MdiParent;

In VB.Net:

    ' from an existing MdiChild
    Dim frm As New Form
    frm.MdiParent = Me.MdiParent

If that doesn't help can you give mored details and/or show some code?

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MIREESEAuthor Commented:
Thanks Much!
I am able to call the child dialog in the MDI. the problem is when I try to call a dialog from an MDI child. It appears outside the MDI. I would like to call it in the MDI as well?
Mike TomlinsonMiddle School Assistant TeacherCommented: you're trying to use ShowDialog() then?

ShowDialog() only appears OUTSIDE the MdiParent as its own window.  =\

If you want it to be within the MdiParent then you have to simulate the "modal" aspect by manually disabling all the other children and any MdiParent elements.
MIREESEAuthor Commented:
Wow! Do you have an example of that?
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