If necessary, open Visual Studio Express in administrator mode.

Go to File, then click on Open Project, browse to the Bestaurants project from the C:\ArcGISByExample\bestaurants\Code, and click on Open.

We need the txtSearchform control to have access to ArcMap application. For that, we need to add an Application property and then set it. Right-click on txtSearchForm.vb and select View Code.

Add the following property to the code:

Public Class txtSearchform

    Private _application As ESRI.ArcGIS.Framework.IApplication
    Public Property ArcMapApplication() As ESRI.ArcGIS.Framework.IApplication
        Get
            Return _application
        End Get
        Set(ByVal value As ESRI.ArcGIS.Framework.IApplication)
            _application= value
        End Set
    End Property
End Class

Double-click on cmSearch.vb to view the code...