VBA Form Techniques

Open a form from another form

Private Sub cmdSupplierForm_Click() DoCmd.OpenForm "frmSupplierDetails"End Sub

Code in Standard module

Public Function FormOpen(strName As String) DoCmd.OpenForm strNameEnd Function

Code in Cass module

OpenForm Method• Method of DoCmd object• Syntax:

DoCmd.OpenForm(FormName, View, FilterName, WhereCondition, DataMode, WindowMode, OpenArgs)

• Arguments:– FormName Valid name of form in current database (Required – all other arguments are

optional)– View acFormView constant e.g.:

• acNormal (default)• acDesign

– FilterName Valid name of query in current database – WhereCondition SQL WHERE clause (without the word WHERE)– DataMode The data entry mode for the form acFormOpenDataMode constant e.g.:

• acFormAdd• acFormEdit• acFormPropertySettings (default)

– WindowMode The window mode in which the form opens acWindowMode constant e.g.:• acWindowNormal (default)

– OpenArgs use to set OpenArgs property of form

Using named argumentsDoCmd.OpenForm(FormName, View, FilterName, WhereCondition, DataMode, WindowMode, OpenArgs)

Want to set value of WhereCondition argument

Default values acceptable for all other arguments

Method 1: Use commas as placemarkers for omitted arguments

DoCmd.OpenForm “frmSupplierDetails” , , , “CoID=“ & txtCoID

Method 2: Use named arguments

DoCmd.OpenForm “frmSupplierDetails” , WhereCondition := “CoID=“ & txtCoID

Code to list forms in database

Private Sub Form_Load() Dim objAO As AccessObject Dim objCP As Object Dim strValues As String Set objCP = Application.CurrentProject For Each objAO In objCP.AllForms strValues = strValues & objAO.Name & ";" Next objAO lstForms.RowSourceType = "Value List" lstForms.RowSource = strValuesEnd Sub

NotInList Event

• Occurs when user enters value in Combo box that is not in Combo box list

• Limit to list property must be set to “Yes” for this event to occur

• Private Sub cboBoxName_NotInList (NewData As String, Response As Integer)

– NewData – the text entered by the user– Response – indicates how the event was handled

• acDataErrDisplay (default) – displays default error message• acDataErrContinue – use to display custom message• acDataErrAdded – does not display message. Enables you to add value to list.

NotInList Example 1 (adding new value to value list)

Private Sub cboEmpTitle_NotInList(NewData As String, Response As Integer)

Dim cbo As Control Set cbo = Me.cboEmpTitle

If MsgBox(NewData & " is not in list - Do you want to add this value?", vbOKCancel) = vbOK Then

Response = acDataErrAdded cbo.RowSource = cbo.RowSource & ";" & NewData Else Response = acDataErrContinue cbo.Undo End If End Sub

Private Sub cboOrigin_NotInList(NewData As String, Response As Integer) Dim intNew As Integer, strCountry As String, rst As Recordset intNew = MsgBox("Add country " & NewData & " to list?", vbYesNo) If intNew = vbYes Then Set rst = CurrentDb.OpenRecordset("tblCountryLookup") rst.AddNew rst!Country = NewData rst.Update Response = acDataErrAdded Else MsgBox ("The country you entered isn't in the list. Select a country from the list or

enter a value to add") DoCmd.RunCommand acCmdUndo Response = acDataErrContinue End If End Sub

NotInList Example 2 (adding new record to lookup table)