If a timer is set to go off every X seconds, how do i show time left b4 it executes?

If a timer is set to go off 10000 milliseconds (10 seconds), how can i display how much time is left before its executed?

Instead of setting the interval to 10000, set it to 1000 (1 second) and use a static variable to count how many seconds it's been. This example requires a timer (Timer1) and a label (Label1):

VB Code:

Private Sub Form_Load()
  Timer1.Interval = 1000
  Label1.Caption = "10 seconds remaining."
End Sub
 
Private Sub Timer1_Timer()
Static num As Integer
  
  num = num + 1
  If num = 10 Then
    'do your stuff here
    MsgBox "10 seconds is up"
    num = 1
    Label1.Caption = 10
  Else
    Label1.Caption = 10 - num & " seconds remaining."
  End If
End Sub