GetChildIndex Method (Control, Boolean)
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Control.ControlCollection.GetChildIndex Method (Control, Boolean)


Retrieves the index of the specified child control within the control collection, and optionally raises an exception if the specified control is not within the control collection.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

Public Overridable Function GetChildIndex (
	child As Control,
	throwException As Boolean
) As Integer


Type: System.Windows.Forms.Control

The Control to search for in the control collection.

Type: System.Boolean

true to throw an exception if the Control specified in the child parameter is not a control in the Control.ControlCollection; otherwise, false.

Return Value

Type: System.Int32

A zero-based index value that represents the location of the specified child control within the control collection; otherwise -1 if the specified Control is not found in the Control.ControlCollection.

Exception Condition

The childControl is not in the Control.ControlCollection, and the throwException parameter value is true.

The control with an index value of zero is at the top of the z-order, and higher numbers are closer to the bottom. A return value of -1 is returned only when the throwException parameter is false.

.NET Framework
Available since 1.1
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