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Asked: 2026-05-13T07:48:21+00:00

How would I P/Invoke a C function which returns a union’ed struct?

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How would I P/Invoke a C function which returns a union’ed struct?

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  1. Editorial Team

    You would need to use a StructLayout of explicit and the FieldOffset attribute.

    An example of usage:

    <StructLayout(LayoutKind.Explicit, Size:=4)> _
   Public Structure DWord
      <FieldOffset(0)> Public Value As Int32
      <FieldOffset(0)> Public High As Int16
      <FieldOffset(2)> Public Low As Int16
   End Structure
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