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Form.IsMdiChild Property

Gets a value indicating whether the form is a multiple-document interface (MDI) child form.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public bool IsMdiChild { get; }
/** @property */
public boolean get_IsMdiChild ()

public function get IsMdiChild () : boolean

Property Value

true if the form is an MDI child form; otherwise, false.

At run time, MDI child forms are displayed inside the client area of an MDI parent form. An MDI child form can be maximized, minimized, and moved within the MDI parent form. To create an MDI child form, assign the Form that will be the MDI parent form to the MdiParent property of the child form. You can use the IsMdiContainer property to determine whether a form is an MDI parent form.

You can use the IsMdiChild property to determine whether a form returned by a method or property is an MDI child form or a standard form in your application such as a dialog box.

NoteNote

All MDI child forms have sizable borders, a control-menu box, and Minimize and Maximize buttons, regardless of the settings of the FormBorderStyle, ControlBox, MinimizeBox, and MaximizeBox properties.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0
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