'Declaration
 
Protected Overrides Sub OnItemAdding( _
   ByVal index As Integer, _
   ByVal item As ColumnBase _
) 

'Usage
 
Dim instance As MergedColumnCollection
Dim index As Integer
Dim item As ColumnBase
 
instance.OnItemAdding(index, item)

protected override void OnItemAdding( 
   int index,
   ColumnBase item
)

Parameters

index

item

Target Platforms: Windows 11, Windows, 10, Windows 7, 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

Reference

MergedColumnCollection Class
MergedColumnCollection Members
Base Implementation in OnItemAdding