Process Sleep or Query Messages Silently

[This is preliminary documentation and subject to change.]

Recommendation   (Designed for Microsoft® Windows® Logo)

Your application should not request any user input while it is processing a WM_POWERBROADCAST sleep or query message.

Exception

Your application can display a confirmation dialog box only if both of the following conditions are met:

• The UI Allowed bit is set in the WM_POWERBROADCAST message.
• Putting the computer to sleep will cause user data loss or corruption.

See Also

For a description of pretesting you can do to ensure that your application provides proper ACPI/OnNow support, see Pretesting ACPI/OnNow support.

For more information about the OnNow initiative and for OnNow technical specifications, see http://www.microsoft.com/hwdev/onnow.htm.