Program.cs

        [DllImport("kernel32.dll", SetLastError = true)]
        static public extern bool CloseHandle(IntPtr hHandle);

        [DllImport("kernel32.dll")]
        static public extern bool Module32First(IntPtr hSnapshot, ref MODULEENTRY32 lpme);

        [DllImport("kernel32.dll")]
        static public extern bool Module32Next(IntPtr hSnapshot, ref MODULEENTRY32 lpme);

        [DllImport("kernel32.dll", SetLastError = true)]
        static public extern IntPtr CreateToolhelp32Snapshot(SnapshotFlags dwFlags, uint th32ProcessID);

        public const short INVALID_HANDLE_VALUE = -1;

        [Flags]
        public enum SnapshotFlags : uint
        {
            HeapList = 0x00000001,
            Process = 0x00000002,
            Thread = 0x00000004,
            Module = 0x00000008,
            Module32 = 0x00000010,
            Inherit = 0x80000000,
            All = 0x0000001F
        }

        [StructLayoutAttribute(LayoutKind.Sequential)]
        public struct MODULEENTRY32
        {
            public uint dwSize;
            public uint th32ModuleID;
            public uint th32ProcessID;
            public uint GlblcntUsage;
            public uint ProccntUsage;
            IntPtr modBaseAddr;
            public uint modBaseSize;
            IntPtr hModule;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
            public string szModule;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
            public string szExePath;
        };

        static void EnumProcessModules(uint procIDDDDDDDDDDDDD)
        {
            var snapshot = CreateToolhelp32Snapshot(SnapshotFlags.Module | SnapshotFlags.Module32, procIDDDDDDDDDDDDD);
            MODULEENTRY32 mod = new MODULEENTRY32() { dwSize = (uint)Marshal.SizeOf(typeof(MODULEENTRY32)) };
            if (!Module32First(snapshot, ref mod))
                return;

            List<string> modules = new List<string>();
            do
            {
                modules.Add(mod.szModule);
            }
            while (Module32Next(snapshot, ref mod));
        }