How to notify Windows about changes in Desktop settings?

Question

How to notify Windows system that some appearance settings has been changed by my program?

I'm working with:

HKEY_CURRENT_USER\Control Panel\Desktop -> FontSmoothing + FontSmoothingType

What is a standard way? Maybe there is some message. Where to send it?

Answer 1

Don't modify the registry directly.

Instead, call the SystemParametersInfo function:

SystemParametersInfo(SPI_SETFONTSMOOTHING, TRUE, NULL, SPIF_UPDATEINIFILE);