Form.ActiveMdiChild Property
.NET Framework (current version)
Gets the currently active multiple-document interface (MDI) child window.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
You can use this method to determine whether there are any MDI child forms open in your MDI application. You can also use this method to perform operations on an MDI child window from its MDI parent form or from another form that is displayed in your application.
If the currently active form is not an MDI child form, you can use the ActiveForm property to obtain a reference to it.
.NET Framework
Available since 1.1
Available since 1.1
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