<CategoryAttribute("Behavior")>
<DescriptionAttribute()>
Public Event InitializeLayout As LayoutEventHandler

Dim instance As WebCombo
Dim handler As LayoutEventHandler
 
AddHandler instance.InitializeLayout, handler

[CategoryAttribute("Behavior")]
[DescriptionAttribute()]
public event LayoutEventHandler InitializeLayout

public event InitializeLayout: LayoutEventHandler; 

In JScript, you can handle the events defined by another class, but you cannot define your own.

[CategoryAttribute("Behavior")]
[DescriptionAttribute()]
public: __event LayoutEventHandler* InitializeLayout

[CategoryAttribute("Behavior")]
[DescriptionAttribute()]
public:
event LayoutEventHandler^ InitializeLayout

private void WebCombo1_InitializeDataSource(object sender, ISNet.WebUI.WebCombo.DataSourceEventArgs e)
{
    oleDbDataAdapter1.Fill(dataSet11.Customers);
    e.DataSource = dataSet11;
}

private void WebCombo1_InitializeLayout(object sender, ISNet.WebUI.WebCombo.LayoutEventArgs e)
{
    e.Layout.ComboMode = Mode.MultipleColumns; 
    WebCombo1.AdditionalSearchFields = "ContactName, City, Country";
    e.Layout.Combo.BorderColor = System.Drawing.Color.Red;
    e.Layout.Combo.BackColor = System.Drawing.Color.Gray;
}