************************************************** *************
hi, i tested this Walkthrough.
http://msdn.microsoft.com/library/de...InWebForms.asp
************************************************** *************
i can run this command with SqlCommand

UPDATE Categories
SET CategoryName = @categoryname, Description = @categorydescription WHERE (CategoryID = @categoryid)

   With sqlcommandUPDATE
      .Parameters("@ID").Value = ListBox.selectedtext
      .Parameters("@name").Value = txtName.Text
      .Parameters("@description").Value = txtdescription.Text
   End With

?????????????????????????????????????????????????? ?????????

But my code for OLEDB is not execute this sql command.

UPDATE Categories SET CategoryName = ?, Description = ? WHERE (CategoryID = ?)

        With cmdCategoriesUpdate
            .Parameters("ID").Value = ListBox.selectedtext
            .Parameters("Name").Value = txtCategoryName.Text
            .Parameters("Description").Value = txtDescription.Text
        End With
?????????????????????????????????????????????????? ???????????

and i added this lines in my codes

        cmdCategoriesUpdate.Parameters.Add(New OleDb.OleDbParameter("ID", OleDb.OleDbType.VarChar, 5, "ID"))
        cmdCategoriesUpdate.Parameters.Add(New OleDb.OleDbParameter("Name", OleDb.OleDbType.VarChar, 15, "Name"))
        cmdCategoriesUpdate.Parameters.Add(New OleDb.OleDbParameter("Description", OleDb.OleDbType.VarChar, 16, "Description"))

Can you tell me a little bit?