Hello, I'm using this:
VB Code:
  1. Private dacustomers As New SqlClient.SqlDataAdapter

  2.     Private selectcom As New SqlClient.SqlCommand("SELECT * FROM Customers")

  3.     Private ds As New DataSet("Northwind")

  4.     Private SQLCount As String = "SELECT Count(CustomerID) FROM Customers"

  5.     Private RecordCount As Integer

  6.     Private bmCustomers As BindingManagerBase

  7.     Private InsBuilder As New StringBuilder

  8.     Private EDBuilder As New StringBuilder

  9.  
  10.    Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click

  11.  
  12.         If btnAdd.Text = "ADD" Then

  13.             btnAdd.Text = "Finish"

  14.             TextBox1.Text = ""

  15.             TextBox2.Text = ""

  16.             TextBox3.Text = ""

  17.         Else

  18.             btnAdd.Text = "ADD"

  19.             'SqlConnection1.Open()

  20.  
  21.             InsBuilder.Append("INSERT INTO Customers (CompanyName,CustomerID,ContactName) ")

  22.             InsBuilder.Append("VALUES (")

  23.             InsBuilder.Append(TextBox1.Text)

  24.             InsBuilder.Append(",")

  25.             InsBuilder.Append(TextBox2.Text)

  26.             InsBuilder.Append(",")

  27.             InsBuilder.Append(TextBox3.Text)

  28.             InsBuilder.Append(")")

  29.             Dim InsComm As New SqlClient.SqlCommand("InsBuilder")

  30.             dacustomers.InsertCommand = InsComm

  31.             dacustomers.InsertCommand.ExecuteNonQuery()

  32.         End If

  33.     End Sub

  34.  
  35.     Private Sub btnEdit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEdit.Click

  36.         If btnEdit.Text = "EDIT" Then

  37.             btnAdd.Text = "Update"

  38.             TextBox1.Text = ""

  39.             TextBox2.Text = ""

  40.             TextBox3.Text = ""

  41.         Else

  42.             btnAdd.Text = "EDIT"

  43.             EDBuilder.Append("UPDATE Customers SET ")

  44.             EDBuilder.Append("CompanyName = ")

  45.             EDBuilder.Append(TextBox1.Text)

  46.             EDBuilder.Append(",")

  47.             EDBuilder.Append("CustomerID = ")

  48.             EDBuilder.Append(TextBox2.Text)

  49.             EDBuilder.Append(",")

  50.             EDBuilder.Append("ContactName = ")

  51.             EDBuilder.Append(TextBox3.Text)

  52.  
  53.             dacustomers.SelectCommand.ExecuteNonQuery()

  54.         End If

  55.     End Sub

to try add and edit records, but The compiler keeps throwing me out, complaining about a table not specified

How can I fix this, to add and edit records at run time?