C# Signature:

[DllImport("gdi32.dll")]
static extern bool LineDDA(int nXStart, int nYStart, int nXEnd, int nYEnd,
   LineDDADelegate lpLineFunc, IntPtr lpData);

   // The signature for the callback method
   public delegate void LineDDADelegate(int X, int Y, IntPtr lpData);

User-Defined Types:

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Notes:

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