Sources

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct Sources
{
    public uint sourceId;
    public int numTargets;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)] public uint[] aTargets;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure Sources
    Public sourceId As UInteger
    Public numTargets As Integer
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=1)> Public aTargets() As UInteger
End Structure

import ctypes
from ctypes import wintypes

class Sources(ctypes.Structure):
    _fields_ = [
        ("sourceId", wintypes.DWORD),
        ("numTargets", ctypes.c_int),
        ("aTargets", wintypes.DWORD * 1),
    ]

#[repr(C)]
pub struct Sources {
    pub sourceId: u32,
    pub numTargets: i32,
    pub aTargets: [u32; 1],
}

import "golang.org/x/sys/windows"

type Sources struct {
	sourceId uint32
	numTargets int32
	aTargets [1]uint32
}

type
  Sources = record
    sourceId: DWORD;
    numTargets: Integer;
    aTargets: array[0..0] of DWORD;
  end;

const Sources = extern struct {
    sourceId: u32,
    numTargets: i32,
    aTargets: [1]u32,
};

type
  Sources {.bycopy.} = object
    sourceId: uint32
    numTargets: int32
    aTargets: array[1, uint32]

struct Sources
{
    uint sourceId;
    int numTargets;
    uint[1] aTargets;
}