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OLE Automation Problem

Posted on 2004-04-06
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Last Modified: 2010-04-05
I am trying to do some OLE automation.

There are two possible scenarios that occur when my client tries to "talk" to my server.


A.   Server is already running.  Client does its thing properly, and when finished, the server keeps running.  (This is the desired behavior)

B.   Server is not already running.  When client requests the interface, the server EXE is automatically launches and the client does its thing properly.  This is good.  However, as soon as the client is done with the interface, the server EXE closes.  (This is not the desired behavior)


In scenario B, how do I make it so the server continues to run after the client is done with it?  (i.e., never automatically closes)
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Question by:scrapdog
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2 Comments
 
LVL 26

Accepted Solution

by:
Russell Libby earned 2000 total points
ID: 10769172
Catch and handle the ComServer.OnLastRelease

simplified (but functional) example

type
  TComHandler = class(TObject)
  public
     procedure OnLastRelease(var Shutdown: Boolean);
  end;

procedure TComHandler.OnLastRelease(var Shutdown: Boolean);
begin
  Shutdown:=False;
end;

initialization

  TAutoObjectFactory.Create(ComServer, TMemoApp, Class_MemoApp, ciSingleInstance, tmApartment);

  if (ComServer.StartMode = smAutomation) then
  begin
     with TComHandler.Create do ComServer.OnLastRelease:=OnLastRelease;
  end;


Regards,
Russell

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LVL 5

Author Comment

by:scrapdog
ID: 10769245
Excellent.  Thanks.
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