Question : Sync multiple subforms

I have a main form related to a table containing client information [tblClientInfo] PK is [infSSN]. On the main form I am using tab control with three seperate subforms containing different areas of information [sfrmClientInfo] [sfrmLegalInfo] [sfrmClassInfo]. The three subforms are all related to a second table with PK [infCaseNumber]. The tables have a one-to-many relationship. My problem is that the subforms do not sync up. I need for the second and third subforms to reflect the record selected on the first subform. I have read about using a hidden text box but can't get it to work.

Answer : Sync multiple subforms

That's right.

Create a textbox on the main form.
Set its ControlSource =SyncSubs([sub1]![ID],[sub2]![ID])
where sub1 and sub2 are the names of the subform controls (not the subformes themselves) and ID is the primary key of each subform.

Then under menu
  Tools, References
establish a reference to DAO 3.60.

Now, create this function in the code module of the main form:

Private Function SyncSubs( _
  ByVal varID1 As Variant, _
  ByVal varID2 As Variant) _
  As Variant

  Dim rst         As DAO.Recordset
 
  Static varIDc1  As Variant
  Static varIDc2  As Variant
 
  Dim bmk         As Variant
  Dim varID       As Variant
 
  If IsNull(varID1) Or IsNull(varID2) Then
    ' New record. Don't sync.
  ElseIf varID1 = varID2 Then
    ' Initial setting.
    varIDc1 = varID1
    varIDc2 = varID2
  Else
    If varID1 <> varIDc1 Then
      ' sub1 has moved. Sync sub2.
      Set rst = Me!sub2.Form.RecordsetClone
      rst.FindFirst "ID = " & Me!sub1.Form!ID
      If Not rst.NoMatch Then
        bmk = rst.Bookmark
        Me!sub2.Form.Bookmark = bmk
        varID = varID1
      End If
      rst.Close
    End If
    If varID2 <> varIDc2 Then
      ' sub2 has moved. Sync sub1.
      Set rst = Me!sub1.Form.RecordsetClone
      rst.FindFirst "ID = " & Me!sub2.Form!ID
      If Not rst.NoMatch Then
        bmk = rst.Bookmark
        Me!sub1.Form.Bookmark = bmk
        varID = varID2
      End If
      rst.Close
    End If
  End If
  If Not IsEmpty(varID) Then
    varIDc1 = varID
    varIDc2 = varID
  End If
 
  Set rst = Nothing
 
  SyncSubs = varID

End Function


Of course, adjust the names of the subform controls and the IDs to those of yours.

/gustav