How does Windows change Aero Glass color?

Question

I'm using Windows 7 RTM and I wonder how the control panel is able to update the Aero Glass color so smoothly without restarting the DWM (uxsms). DwmSetColorizationColor isn't working any more...

Answer 1

The following methods should be of interest to you:

[DllImport("dwmapi.dll", EntryPoint = "#127", PreserveSig = false)]
public static extern void DwmGetColorizationParameters(out WDM_COLORIZATION_PARAMS parameters);

[DllImport("dwmapi.dll", EntryPoint = "#131", PreserveSig = false)]
public static extern void DwmSetColorizationParameters(WDM_COLORIZATION_PARAMS parameters, uint uUnknown);

public struct WDM_COLORIZATION_PARAMS {
    public uint Color1;
    public uint Color2;
    public uint Intensity;
    public uint Unknown1;
    public uint Unknown2;
    public uint Unknown3;
    public uint Opaque;
}

Make sure you make a call to DwmIsCompositionEnabled before calling the DwmSetColorizationParameters method or it will fail.

As you can see some of the arguments/properties are unknown.
For more information, here is a link (in German)