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Form.IsMdiChild Property

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

[Visual Basic]
Public ReadOnly Property IsMdiChild As Boolean
public bool IsMdiChild {get;}
public: __property bool 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.

Note   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.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

Form Class | Form Members | System.Windows.Forms Namespace | MdiParent | MdiChildren | IsMdiContainer