Hidden things that System Properties does

 

W32PROP.EXE relies on a timer (if selected - see Settings) to perform certain operations; others execute automatically; some system events are logged for reference. List is as follows:
  1. Error Log - the program creates a log, in the form of filename.SLG in the Windows System folder. Application errors are logged here, as well as system events that may be of interest to the user. The setup program logs its own errors in setup.SLG, HexViewer in hexview.SLG, w32prop.exe in w32prop.SLG, w32prop.cpl in rundll32.SLG These logs are viewable from the Event Log page.
  2. WM_TIMER - MAPI page has its own timer to auto-refresh mail status
  3. Sytem events of interest are written to the log as follows: WM_DISPLAYCHANGE (video resolution changes); Wallpaper being changed; WM_DEVICECHANGE (new hardware, CDs inserted/removed, etc; Print jobs started, disks low on space.  The Control Panel applet does not have a timer as it is not always active like the TaskBar application.
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