How to compare record to see what was changed

To do this you need to use the before update method for the fields that you want to demarcate as being revised. Since that you are using an unbounded form you will need to perform a DLookup to check if the new value is the same as the value in the table.

The syntax will be something like

Private Sub BeforeUpdate_txtInstruction

If Me.txtInstruction Is Not Like DLookup("fldInstruction","tblCustomerInstruction","fldCostomerID=" & Me.fldCustomerID) then

Me.fldRevised=Yes

End If

End Sub

You may need additional code if there is no instructions and I can help with that if you wish to proceed with this approach.

An alternative would be to use a bounded for for the component that may need revising. Then use the onchange event to trigger the revise action.

Your post states that you need to "See" what changed.

Does this mean you want to "Display" the value (the before or after value), ...or does this simple mean you want to update the Revised field "silently"...?

It is also not clear if you need this on more than one field.

For example, you can do this if you want to update the Revised field if anything changed in the record.

Private Sub Form_BeforeUpdate(Cancel As Integer)
    me.revised=True
End Sub

(Note that this is on the BeforeUpdate event of the *form*)


But note here the persistence...
If you created a record at 9am, I will presume that the Revised Field would be set to False. (buy default, because it is a new record, and hence, no revisions)

At 10AM the record is changed, now the Revised field gets set to True.
...so far so good...
Now, ...what happens if the record is changed again at 11 AM? (the "Change" from 10 am to 11 am)...How would this "change" be noted?

In other words, if the revised field is ever set to True, does it stay that way forever?...or at some point does this get reset?
If it gets reset, then you will have to manage this carefully
per form open close?
Per user?
Per user form open close
per day?
per Database Open/close
...etc


JeffCoachman

How are you loading your unbound forms? Depending on how you do this, you may just be able to compare the current data (the value on the form) with the data that you used to fill the form. For example, if you are using a Class module to work with your form, you could easily build a method to flag the class whenever your relevant data is changed.

Scott, I am loading the form with through this Recordset

   

strSQL = "Select * from VW_LOAD_HED where LD_NUM =" & sParm
                Set rs = CurrentDb.OpenRecordset(strSQL)
                
                    rs.MoveFirst
                        txt_carrier = rs("LD_CARRIER")
                        txt_reqDate = rs("LD_REQ_DATE")
                        txt_shipDate = rs("LD_SHIP_DATE")
                        cbo_custID = rs("LD_CUST_ID")
                        txt_CustID = rs("LD_CUST_ID")
                        txt_CustName = rs("LD_CUST_NAME")
                        txt_CustCity = rs("LD_CUST_CITY")
                        txt_CustState = rs("LD_CUST_STATE")
                        txt_CustZip = rs("LD_CUST_ZIP")
                        txt_custPhone = rs("CUST_PHONE")
                        txt_delCarrier = rs("LD_DEL_CARRIER")
                        Me.txt_apptDate = rs("LD_APPT_DATE")
                        Me.txt_apptTime = rs("LD_ARRIV_DATE")
                        cbo_shipToID = rs("LD_SHIPTO_ID")
                        txt_shipToName = rs("DET_NAME")
                        txt_shipToCity = rs("DET_CITY")
                        txt_shipToState = rs("DET_STATE")
                        txt_shipToZip = rs("DET_ZIP")
                        txt_shipToPh = rs("DET_PHONE")
                        txt_Instr = rs("LD_INSTRUCTIONS")
                        Me.txt_delDate = rs("LD_DEL_DATE")
                        txt_bolNum = rs("LD_SHIP_NUM")
                        txt_bolLoc = rs("LD_SHIP_LOC")
                        cbo_inbShipperID = rs("LD_INB_SHIPPER")
                        txt_locName = rs("LD_LOC")
                        cbo_loc = rs("LD_LOC")
                        txt_createdBy = rs("LD_CREATED_BY")
                        txt_createdOn = rs("LD_CREATED_DATE")
                        txt_modifiedBy = rs("LD_MODIFIED_BY")
                        txt_modifiedOn = rs("LD_MODIFIED_DATE")
                        CHK_CANCELLED = rs("LD_CANCELLED")
                        txt_PrtDate = rs("LD_PRINT_DATE")
                            If rs.("LD_REV_NUM") > 0 Then
                                txt_rev.Visible = True
                                lbl_rev.Visible = True
                                txt_rev = rs("LD_REV_NUM")
                            Else
                                txt_rev.Visible = False
                                lbl_rev.Visible = False
                            End If
                            
                        rs.Close
                        Set rs = Nothing

Select allOpen in new window

Let me clarify a couple of things.  I do not need to verify the change on load, I need to verify it on save.   If these things change:

Carrier
Appointment Time
Arrival Time
Vehicle Number

Then I do not want to add to the revision #.

What happens is on save it looks to see if the load was revised before using a lookup string.  If it was revised then it adds one to the previous number to get the next revision #.  If it was not revised then it updated the record (column REVISED) with "Y" and sets the revision # to 1.

This is with any other change other than listed above.  If only these things listed are changed it does not trigger a revision and should only be an update to the record.

<unbound forms>
...oops, ...didn't notice that...

Oh,
Your rev's are already good
<What happens is on save it looks to see if the load was revised before using a lookup string.  If it was revised then it adds one to the previous number to get the next revision #.  If it was not revised then it updated the record (column REVISED) with "Y" and sets the revision # to 1.>

still working on this guys, but a little delay.  Will come back and accept when I get back to this item.  

Both good answers and I have actually used both in two different circumstances.  Thanks as always!