Help getting .Net WinForms apps to support Vista Aero Glass

//reference Desktop Windows Manager (DWM API)
[DllImport( "dwmapi.dll" )]
static extern void DwmIsCompositionEnabled( ref bool pfEnabled );

[DllImport( "dwmapi.dll" )]
static extern int DwmExtendFrameIntoClientArea( IntPtr hWnd, ref MARGINS pMarInset );


//then on form load
//check for Vista
if ( Environment.OSVersion.Version.Major >= 6 )
{
    //check for support
    bool isGlassSupported = false;
    DwmIsCompositionEnabled( ref isGlassSupported );

    if ( isGlassSupported )
        DwmExtendFrameIntoClientArea( this.Handle, ref margins );
...

//finally on print draw a black box over the alpha-ed area
//Before SP1 you could also use a black form background