XnView Software

No, I had this line, but procedure still wasn't called.

In my project, which is pretty much simple, I've walked around the problem with one of these gifs: http://www.cinemamuseum.ir/images/ajax-loader.gif
But I've never managed to run my callback function.

Hello.

I'm trying to use progress callback procedure while loading a picture.
Here is the code (modified example from GflSDK\Delphi\Demo\Source\):

procedure ProgressCallback(percent: GFL_INT32; user_params: Pointer); stdcall;
begin
Application.MessageBox('Procedure is called', 'OK', MB_OK + MB ...