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MyAddIn.vb
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MyAddIn.vb
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Imports System.IO
Imports Microsoft.Office.Interop.Access.Dao
Imports ExcelDna.Integration
Public Module MyAddIn
' This would not be needed in VBA - in .NET we must instantiate the root COM object
Private MyDBEngine As New DBEngine()
Private MyDatabase As Database
Const MyDatabasePath As String = "TestDB.mdb"
Private Sub EnsureDatabaseIsConnected()
If MyDatabase Is Nothing Then
' We've not set the database yet - try to open or create a new one
If File.Exists(MyDatabasePath) Then
MyDatabase = MyDBEngine.OpenDatabase(MyDatabasePath)
Else
' Create new DB for testing - this could be OpenDatabase too
MyDatabase = MyDBEngine.CreateDatabase(MyDatabasePath, Locale:=LanguageConstants.dbLangGeneral)
' Add the tables or give an error ....
' ...
End If
End If
End Sub
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' These will be UDF functions you can call from a sheet...
' Check that the DAO is working correctly
<ExcelFunction(Description:="Returns the version of the loaded DAO DBEngine")>
Public Function DBEngineVersion() As Object
Return MyDBEngine.Version
End Function
' Check that the database was opened
<ExcelFunction(Description:="Returns the name of the open database")>
Public Function DatabaseName() As String
EnsureDatabaseIsConnected()
Return MyDatabase.Name
End Function
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' This will be a macro added to the Add-Ins tab on the ribbon
<ExcelCommand(MenuName:="Excel-DNA DAO Sample", MenuText:="Show Database Name")>
Public Sub ShowDatabaseName()
EnsureDatabaseIsConnected()
MsgBox(MyDatabase.Name, Title:="DAO Sample")
End Sub
End Module