trying to change wallpaper in windows
Ihave my module which has 2 api calls
one for win path the other for systemparametersinfo
SPI_SETDESKWALLPAPER = 20

I have set the path Rivetspath & point to a bmp in the windsows file Rivets.bmp

I understand things up to here...

retval = SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, ByVal Rivetspath, SPIF_SENDWININICHANGE Or SPIF_UPDATEINIFILE)

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here is what I don't understand

What are SPIF_SENDWININICHANGE Or SPIF_UPDATEINIFILE)

Do I have to make declares for these?
Do I have to do anything for these?

I msgbox for display and I get the correct path and retval=1 but that is it..no change.