[fpc-pascal] Re: Library callback : how do I do that?

Michael Schnell mschnell at lumino.de
Fri Aug 9 09:28:47 CEST 2013

On 08/08/2013 02:41 PM, Lukasz Sokol wrote:
> Very well then, thanks :)

I suggest that - to exclude problems that might be imposed by some 
external non-Lazarus and software not by yourself  - you do a test 
creating a combination of a Lazarus Application and a Lazarus-made dll 
(and/or so) that features a TThread in the dll and uses 
Application.QueuAsyncCall(Form1.DisplayCallFromDLL, NIL) to display some 
running counter or similar stuff.

I understand for this you need to
  - unify the Heaps of Application and dll
  - do a call to the dll to provide the Application and the Form1 main 
form instances of the calling  program

If you succeed in doing a really reliable Test implementation of this, I 
would be happy to see the source code.

This could be the basis of a "standard" implementation of something 
similar to Delphi runtime packages.


More information about the fpc-pascal mailing list