Watch it! MAPI32 is not supported from managed code [http://blogs.msdn.com/mstehle/archive/2007/10/03/fyi-why-are-mapi-and-cdo-1-21-not-supported-in-managed-net-code.aspx]

    public static extern void glClearColor(float red, float green, float blue, float alpha);

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static extern bool AngleArc(IntPtr hdc, int X, int Y, uint dwRadius,

static extern bool ArcTo(IntPtr hdc, int nLeftRect, int nTopRect,

Declare Function ArcTo Lib "gdi32.dll" (ByVal hdc As IntPtr, _

static extern bool ArcTo(IntPtr hdc, int nLeftRect, int nTopRect,

Declare Function ArcTo Lib "gdi32.dll" (ByVal hdc As IntPtr, _