question

Hi BrandonStewart-4522,
Follow the steps below, you will find that "this window is not supported for the selected project." in Winforms(VB) .NET5.
1.Open the Data Sources window, on the View menu, select Other Windows > Data Sources.
It means that the wizard is not supported yet. So you need to connect to the database manually.
I made a test and can access the local Microsoft Access database successfully.
First add data connection in Server Explorer which on View menu.

Then use the following code example to load records from Access Database to Datagridview.

 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
     Dim con As New OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\danielzh\Desktop\test.accdb")
     Try
         con.Open()
    
         If con.State = ConnectionState.Open Then
             MsgBox("Connected")
         Else
             MsgBox("Not Connected!")
    
         End If
     Catch ex As Exception
         MsgBox(ex.Message)
     Finally
         con.Close()
     End Try
     Try
         Dim sql As String
         Dim cmd As New OleDb.OleDbCommand
         Dim dt As New DataTable
         Dim da As New OleDb.OleDbDataAdapter
         con.Open()
         sql = "Select * from Table1"
         cmd.Connection = con
         cmd.CommandText = sql
         da.SelectCommand = cmd
    
         da.Fill(dt)
    
         DataGridView1.DataSource = dt
     Catch ex As Exception
         MsgBox(ex.Message)
     Finally
         con.Close()
     End Try
 End Sub

Best Regards,
Daniel Zhang

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