[Spam] Re: [Spam] Re: [Spam] Re: [Spam] Re: [Spam] Re: [DUG] Interceptingmessagesin separateunits

[Ross Levis]

Right, thanks for that.  That's put me in the right direction.  I think I'll just create a dummy invisible form.

Thanks,
Ross.
  ----- Original Message ----- 
  From: Kyley Harris 
  To: NZ Borland Developers Group - Delphi List 
  Sent: Tuesday, June 28, 2005 4:04 PM
  Subject: [Spam] Re: [Spam] Re: [Spam] Re: [Spam] Re: [Spam] Re: [DUG] Interceptingmessagesin separateunits


  Yes. It is possible. The simplest method is to create a TWincontrol. or a tform

  ie TMyMessageForm = class(TForm)

    set the caption to 'MyMessageForm01'

  findwindow('TMyMessageForm','MyMessageForm01') and then do a sendmessage.

  if you want to do this without creating a tform, then you really need to analyze how the application, and the tforms create handles, and 
  allocate WndProcs to them, and use CreateParams features to assign a classname, and windowname to the handle. 

  instead of AllocateHWND there are a series of calls to winapi routines to create the correct type of handle and then initialize window class parameters, and assign a wndproc to it.

  So It can be done, but it is a big win API topic that is too big for here.

  regards 

     Kyley

  Ross Levis wrote: 
    This is a different excercise to the original problem.  I've solved that by sending the handle to the DLL.

    For this next exercise, imagine an external executable which only knows the Windows class name of myr application.  The other executable does a FindWindow to obtain the handle of my application and then uses this for SendMessage.

    I want to be able to receive and process these messages inside a component in my application.  Is this possible?

    Cheers,
    Ross.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://ns3.123.co.nz/pipermail/delphi/attachments/20050628/acb2306c/attachment.html