When would you like the Modal dialog to appear?  If during the UI sequence,  
just create a Dialog with Yes and No controls and call it with a SpawnDialog 
ControlEvent.   From the Yes control's ControlEvent you can then call a 
DoAction ControlEvent to fire your CA.
   
  If not from the UI Sequence,  I don't really reccomend this since all user 
input should be collected up front.  Do the same thing as above only set a 
PUBLIC property ( and list it in SecureCustomProperties ) and then use that 
during the execute sequence to conditionally call your custom action(s) ( 
uninstall, install, rollback, commit )
  

Ben Greene <[EMAIL PROTECTED]> wrote:
                Hi,
   
  I’ve been searching the archives trying to find out if I can do this, but I 
can’t find out how I’d go about it.
   
  I would like to be able to pop up a message box, asking the user a question, 
with ‘yes’ and ‘no’ buttons.
   
  If the user presses ‘Yes’, I would like a CustomAction to execute.
   
  Is this possible?
   
  Thanks

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