How To Delete Tables from a Windows CE Device from VBCE or eVB

MORE INFORMATION

The following steps illustrate how to delete non system tables from the database store. The assumption is made that there are already tables in existence on the Windows CE device that can be deleted.

Step by Step Example

1. Create a new Windows CE project in either Visual Basic or eMbedded Visual Basic. Form1 is created by default.
2. Place a list box and a command button on Form1.
3. From the Project menu, choose References and add a reference to either the Microsoft CE ADO Control 3.0 or Microsoft CE ADO Control 3.1, whichever is the most current version on your computer.
4. Paste the following code into the code window of Form1:

   Option Explicit
   
   Private Sub Form_Load()
       Dim MyRecordSet
       Dim lMyRecordCount As Long
       Dim lRecordIndex As Long
       Dim sMyTable As String
       
       'initialize controls
       Command1.Caption = "Drop Selected Tables"
       Form1.Caption = "CE Drop Tables"
       Command1.Move 60, 1920, 4695, 495
       List1.Move 60, 60, 4695, 1815
       Form1.Move 0, 0, 4950, 2880
       
       ' Load the ListBox with the Names of Non-System Tables.
       Form1.List1.Clear
       Set MyRecordSet = CreateObject("ADOCE.Recordset")
       MyRecordSet.Open "MSysTables", "", 1, 3
       lMyRecordCount = MyRecordSet.RecordCount
       For lRecordIndex = 0 To lMyRecordCount - 1
           sMyTable = MyRecordSet.Fields("TableName").Value
           If Mid(sMyTable, 1, 4) <> "MSys" Then
               Form1.List1.AddItem sMyTable
           End If
           MyRecordSet.MoveNext
       Next
       MyRecordSet.Close
   End Sub
   
   Sub Command1_Click()
       Dim iIndex As Integer
       Dim MyRecordSet
   
       Set MyRecordSet = CreateObject("ADOCE.Recordset")
       For iIndex = Form1.List1.ListCount - 1 To 0 Step -1
           If Form1.List1.Selected(iIndex) Then
               MyRecordSet.Open "DROP TABLE [" & _
                   Form1.List1.List(iIndex) & "]", , 2, 3
               Form1.List1.RemoveItem (iIndex)
           End If
       Next
   End Sub
   					

   Note that the CreateObject statements may need to be changed depending on whether you have ADOCE 3.0 or 3.1 on your computer.
5. Run the project.

Note that you can select and delete the non system tables from the database store of your Windows CE device.