http://www.directfb.org
index.html
DirectFB Reference Manual
IDirectFBWindow.html
IDirectFBWindow
SetOpacity
Set the window's global opacity factor.
SetOpacity (
IDirectFBWindow.html
IDirectFBWindow
*
thiz,
__u8
opacity
);
Set it to "0" to hide a window. Setting it to "0xFF" makes the window opaque if it has no alpha channel.
