Calling an Exchange API which returns a new array

[davecalkinshexagon]

Here's another case that wasn't immediately obvious. Calling an Exchange API where the call takes, as an argument, a pointer to a pointer to an array. The call allocates a new array and sets the pointer you provide to point to that array.

For example.

                    uint numUpCoEdges = 0;
                    IntPtr upCoEdges = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(IntPtr)));
                    iRet = API.A3DTopoEdgeGetCoEdges(pBrepData1, pTopoEdge, out numUpCoEdges, upCoEdges);