U++ forum: Welcome to the forum

Re: trayicon and shutdown [message #5572 is a reply to message #5571]

Wed, 04 October 2006 10:19

mirek
Messages: 13976
Registered: November 2005

Ultimate Member

atmks wrote on Wed, 04 October 2006 02:40

hi
i have small problem with trayicon example,
when trayicon (or eyecare) is running and i want shutdown
a computer, windows shows a window with message:

  ____________________________________
 |End program - trayicon.exe
 |------------------------------------
 |
 | progress bar
 | ######################
 |
 | If you choose to end program.....
 |                   ---------
 |                  | End now |
 |                   ---------
 |____________________________________

and 2nd message in same window

This program not responding

how can i resolv this?

bye
atmks

Actually, recently I have encountered similiar problem with TheIDE as well. Maybe something is broken with shutdown/exit code (and it is not TrayIcon related).

Just to explain, shutdown/exit code is montrous U++ implementation feature that forces regular exit of U++ application through GUI_APP_MAIN in case of system shutdown. The problem is that Win32 simply posts a message to application, but then quits it immediately, which is a little bit problematic as you are in the WindowProc at the moment - rest of GUI_APP_MAIN is not performed in that case.

U++ therefore starts "overwatch thread" at the start of Win32 GUI app. This thread opens single off-screen window and its purpose is to keep U++ application "alive" until GUI_APP_MAIN finishes.

This extremely fragile code starts at line 82 of CtrlCore/Win32Wnd.cpp. I will look into it ASAP, but maybe you will notice some problem there too....

Mirek

Report message to a moderator