Hi,

I want to develop an application for Windows Vista, which would detect Power
button Press and stop the machine from shutting down or restarting or going
into suspend mode.

After investigation we found that when the machine is shutdown or restarted
"WM_QUERYENDSESSION" message is sent to every process. However to trap this
message we had to use SetProcessShutdownParameters with 3FF as the dwLevel.
To stop the machine from shutting down I returned false when this message
was detected, a dialog box asking the user whether to shutdown or not is
prompted. Is there some way wherein this dailog box can be avoided and the
shutdown process is directly cancelled.

In case of Hibernate and Suspend we learned that wParam is returned as
"PBT_APMQUERYSUSPEND" and "PBT_APMSUSPEND" . But even after using a trap
handler for this we could not trap the event in Windows Vista. I am using
SetThreadExecutionState() API with ES_CONTINUOUS parameters when
"PBT_APMQUERYSUSPEND" and "PBT_APMSUSPEND" message is traped in WndProc()
function for preventing the system from Hibernate and Suspend mode to go.
Can you please let us know how to trap the Hibernate and Suspend event and
mask the Hibernate and Suspend mode?

Regards,
Vikram