Question

application.processMessage

Asked by: jlvill

Hi guys,
I'd like to use the processMessage in a libary, but that doen't work.
I made a programme and when I send an email,
the application freeze as long as the email is not send.
It probably exist a procedure like processMessage,
I may use in a windows api.

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Asked On
2005-07-27 at 11:07:13ID21506535
Tags

processmessage

Topic

Delphi Programming

Participating Experts
5
Points
125
Comments
11

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Answers

 

by: RadikalQ3Posted on 2005-07-27 at 11:21:46ID: 14539649

Hi!

Test with Sleep(0);

for request timeslices for your application.

 

by: ciulyPosted on 2005-07-27 at 11:24:54ID: 14539691

You have the following options:

- send that email from within a thread
- if you use indy, put an antifreeze component on the form (Indy Misc pallette, second component after socks; this is for delphi 7/indy 9)
- pass the Application object to the library with the same procedure/function you use to send the email.

The first 2 solutions are the ones I strongly recommend. The last one is tricky and it works only in some cases: when you are able to call processmessages every x miliseconds for example (this usually happens in a loop)

 

by: Slick812Posted on 2005-07-27 at 16:43:44ID: 14541971

you may be able to use something like this for an Application.ProcessMessages -

var
aMsg: TMSG;
= = = = = == = = = = = = =


while PeekMessage(aMsg, 0, 0, 0, PM_REMOVE) do
  if aMsg.message = WM_QUIT then
     begin
     PostQuitMessage(0);
     Break;
     end else
     if not IsDialogMessage(GetActiveWindow, aMsg) then
       begin
       TranslateMessage(aMsg);
       DispatchMessage(aMsg);
       end;

 

by: Slick812Posted on 2005-07-27 at 17:02:27ID: 14542079

I should mention, if you are placing this code in a Loop, then you need  to place some kind of code in the -
    if aMsg.message = WM_QUIT then

  begin end  block, to EXIT the loop and exit ALL functions and stop everything, because the program has closed and you need to stop everything and let it close

 

by: EugeneK-biruzaPosted on 2005-07-28 at 03:17:30ID: 14544278

The problem is that your application and library have different instances of Application object. This is well known problem in field of using dynamic libraries in Delphi.

What you can do to resolve this:
1. In you library, export a procedure like SetApp(App: TApplication) where you will set library's instance of Application to the passed one
2. After loading your library in your application, call this procedure and pass Application instanse of your app there.

Then library will have same Application object as host app and ProcesMessages must work correctly.

Please let me know if it helps.

 

by: Zabuza-sanPosted on 2005-07-28 at 07:11:03ID: 14545822

just create the email send as a thread. because the application will continue as usual (not freeze) while the thread might freeze which will not affect ur program..

 

by: jlvillPosted on 2005-08-03 at 23:01:42ID: 14595577

Hi guys,
I was gone in  vancncy. I'll wii check  answer ...

 

by: EugeneK-biruzaPosted on 2005-08-04 at 02:35:05ID: 14596439

We hope our efforts will help you to resolve the problem :-)

 

by: EugeneK-biruzaPosted on 2005-09-06 at 00:25:39ID: 14827219

Is your problem resolved? Maybe it would be fair to split points between guys who tried to help?

 

by: jlvillPosted on 2005-09-06 at 07:04:55ID: 14829113

Hi  EugeneK-biruza,
You right Eugene, I will make an other test this week and I will give the points.
Sorry for late,

JL

 

by: jlvillPosted on 2005-09-10 at 00:42:15ID: 14855265

Thanks all ;-)

20120131-EE-VQP-002

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