WM_SETTINGCHANGE

This message is sent when the Control Panel modifies an Auto PC setting that necessitates a notification be sent to running applications.

Syntax

WM_SETTINGCHANGE wParam = wFlag; lParam = NULL

Parameters

wParam

Specifies one of the Auto PC-specific SPI_SETAPC* values described in the following table.

Constant	Value	Description
SPI_SETAPCSHELL	0x000100100	Shell setting changed
SPI_SETAPCSCREENSAVER	0x000100102	Screen saver changed
SPI_SETAPCAUDIO	0x000100104	Audio changed
SPI_SETAPCLOCALE	0x000100106	Locale changed
SPI_SETAPCFEEDBACK	0x000100108	Feedback changed
SPI_SETAPCGLOBALGRAMMAR	0x00010010a	Global grammar changed

lParam

Set to NULL.

Remarks

It is not valid to pass these values to SystemParameterInfo. Instead, they must be explicitly queried for with the appropriate registry settings.