访问/ VBA - 表单属性是否保持表格打开？

Question

更新： 我已经完成了一些测试并禁用了我添加的按钮，当我关闭表单时，表单仍然不会关闭连接。我认为它更多地与表单属性有关，然后按钮后面的代码，或者按钮代码和表单具有保持表打开的冲突属性。

在关闭VBA中的连接后，我还尝试设置rs = Nothing和db = Nothing。

所以我有一个子表单，由我的Mainform调用。发生这种情况时，我尝试使用下面的VBA代码填充一些控件。但是，当我关闭子表单并尝试从Mainform重新访问子表单时，它会说：

Private Sub CommandDupe_Click()
Dim db As DAO.Database, rs As DAO.Recordset
Dim strSQL As String

Set db = CurrentDb()
strSQL = "SELECT TOP 1 CPOrders.Cust, Customer.NAME, CPOrders.CP_Ref, CPOrders.Slsman, CPOrders.Date_opn, CPOrders.CPSmall, CPOrders.InvIssu, CPOrders.InvNo, CPOrders.InvDate, CPOrders.DueDate, CPOrders.ETADate, CPOrders.Closed, CPOrders.Cust, CPOrders.Name, CPOrders.BuyerRef, CPOrders.ToCity, CPOrders.ToState, CPOrders.ToCtry, CPOrders.ToPort, CPOrders.Supplier, CPOrders.Origin, CPOrders.Product, CPOrders.GradeType, CPOrders.NoUnits, CPOrders.Pkg, CPOrders.Qty, CPOrders.TotSale, CPOrders.TotCost, CPOrders.GrMargin, CPOrders.[Sale$/Unit], CPOrders.[Cost$/Unit], CPOrders.OceanCost, CPOrders.OceanNotes, CPOrders.BLadingDate, CPOrders.USAPort, CPOrders.FOBCost, CPOrders.FASExportVal, CPOrders.InlandFrt, CPOrders.CommodCode, CPOrders.Notes, CPOrders.ProjCust, CPOrders.ProjValue, CPOrders.ContainerNumber, CPOrders.Vessel, CPOrders.Ord_Terms, CPOrders.Invoice_ID FROM Customer INNER JOIN CPOrders ON Customer.[CUST_#] = CPOrders.Cust ORDER BY CPOrders.Invoice_ID desc;"
Set rs = db.OpenRecordset(strSQL, dbOpenDynaset, dbReadOnly)
rs.MoveFirst


CP_Ref.Value = rs("CP_Ref")
Slsman.Value = rs("Slsman")
Date_opn.Value = rs("Date_opn")
CPSmall.Value = rs("CPSmall")
InvIssu.Value = rs("InvIssu")
InvNo.Value = rs("InvNo")
InvDate.Value = rs("InvDate")
DueDate.Value = rs("DueDate")
Cust.Value = rs("Cust")
BuyerRef.Value = rs("BuyerRef")
ToCity.Value = rs("ToCity")
ToState.Value = rs("ToState")
ToCtry.Value = rs("ToCtry")
ToPort.Value = rs("ToPort")
Product.Value = rs("Product")
Supplier.Value = rs("Supplier")
GradeType.Value = rs("GradeType")
Origin.Value = rs("Origin")
NoUnits.Value = rs("NoUnits")
Pkg.Value = rs("Pkg")
Qty.Value = rs("Qty")
TotSale.Value = rs("TotSale")
TotCost.Value = rs("TotCost")
OceanCost.Value = rs("OceanCost")
OceanNotes.Value = rs("OceanNotes")
BLadingDate.Value = rs("BLadingDate")
USAPort.Value = rs("USAPort")
FOBCost.Value = rs("FOBCost")
Notes.Value = rs("Notes")
InlandFrt.Value = rs("InlandFrt")
CommodCode.Value = rs("CommodCode")
Vessel.Value = rs("Vessel")
ContainerNumber.Value = rs("ContainerNumber")
ProjCust.Value = rs("ProjCust")
ProjValue.Value = rs("ProjValue")


rs.Close
db.Close

正如你所看到我关闭了rs和db ...我还能做些什么来确保在关闭子表单后关闭这个连接？我需要能够始终如一地从MainForm访问它。

提前致谢!!! 我还添加了不关闭

的表单的表单属性