[AccessD] Using DateDiff function

Yet another opportunity for me to praise static functions :-) Put this into
a public module:

Static Function LastRun() as Date
Dim dtNow as Date
If IsNull(dtNow) Then
	dtNow = Now()
End If
LastRun = dtNow
End Function

Now call this function from your click:

Private Sub Command20_Click()
Dim Andy
If DateDiff("h", Now, LastRun()) <= 15 Then
Andy = MsgBox("You've already updated the records today" & vbCrLf & _
        "Are you sure you wish to update again?", vbYesNo, "alert")
  If Andy = vbNo Then
    Exit Sub
  End If
End If
DoCmd.RunMacro "GetRates"
End Sub

Or, perhaps better, in the OnCurrent event of the form, set the availability
of the button and forget the "You bungling user" message :-)

Command20.Enabled = DateDiff("h", Now, LastRun()) > 15

Which of course poses problems if the user is likely to have the form open
on the same record for hours and hours, but if that is a possibility you can
put the line above into its own function and call that function from a
timer.
Hth,
Arthur

-----Original Message-----
From: accessd-admin at databaseadvisors.com
[mailto:accessd-admin at databaseadvisors.com] On Behalf Of Oleg_123 at xuppa.com
Sent: February 11, 2003 1:53 PM
To: accessd at databaseadvisors.com
Subject: [AccessD] Using DateDiff function

Hey, I am trying to make sure a user doesn'y click on  same button twice
in one day by mistake. I wrote this; doesn't work caz LastRun keeps
getting redefined if it starts over. Maybe I should an invisible label to
store latest update date and then check against the label ?

-------------------------------------------------------
Dim LastRun

Private Sub Command20_Click()
Dim Andy

If DateDiff("h", Now, LastRun) <= 15 Then
Andy = MsgBox("You've alredy updated the records today" & vbCrLf & _
        "Are you sure you wish to update again?", vbYesNo, "alert")
  If Andy = vbNo Then
    Exit Sub
  End If
End If
  DoCmd.RunMacro "GetRates"

LastRun = Now
End Sub


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