OnCategoryAdding Method (DiagramToolboxCategoryCollection)

Called when a category is being added.

Syntax

Visual Basic

'Declaration
 
Protected Overridable Function OnCategoryAdding( _
   ByVal category As DiagramToolboxCategory _
) As Boolean

C#

protected virtual bool OnCategoryAdding( 
   DiagramToolboxCategory category
)

Parameters

category

The category.

Return Value

true adding of the category should be cancelled.

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2