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ToolboxComponentsCreatingEventHandler Delegate

Represents the method that handles the ComponentsCreating event.

Namespace:  System.Drawing.Design
Assembly:  System.Drawing (in System.Drawing.dll)

public delegate void ToolboxComponentsCreatingEventHandler(
	Object sender,
	ToolboxComponentsCreatingEventArgs e


Type: System.Object
The source of the event.
Type: System.Drawing.Design.ToolboxComponentsCreatingEventArgs
A ToolboxComponentsCreatingEventArgs that provides data for the event.

When you create a ToolboxComponentsCreatingEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see Events and Delegates.

The following example code provides a method that attaches an event handler for the ComponentsCreating event of a ToolboxItem, and a ToolboxComponentsCreatingEventHandler event handler method that writes the name of the type of the component that is to receive the new component or components to the Console when the event handler is raised by a ComponentsCreating event.

public void LinkToolboxComponentsCreatingEvent(ToolboxItem item)
    item.ComponentsCreating += new ToolboxComponentsCreatingEventHandler(this.OnComponentsCreating);

private void OnComponentsCreating(object sender, ToolboxComponentsCreatingEventArgs e)
    // Displays ComponentsCreating event information on the Console.
    Console.WriteLine("Name of the class of the root component of " +
    "the designer host receiving new components: " +

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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