C# Constants:

        public class GetWindowConstants {
            public const uint GW_HWNDFIRST = 0;
            public const uint GW_HWNDLAST = 1;
            public const uint GW_HWNDNEXT = 2;
            public const uint GW_HWNDPREV = 3;
            public const uint GW_OWNER = 4;
            public const uint GW_CHILD = 5;
            public const uint GW_ENABLEDPOPUP = 6;
            public const uint GW_MAX = 6;
        }

        //Windows version <= 0x0400
        public class GetWindowConstantsObsolete {
            public const uint GW_HWNDFIRST = 0;
            public const uint GW_HWNDLAST = 1;
            public const uint GW_HWNDNEXT = 2;
            public const uint GW_HWNDPREV = 3;
            public const uint GW_OWNER = 4;
            public const uint GW_CHILD = 5;
            public const uint GW_MAX = 5;
        }

VB Constants:

Public Enum GetWndConsts
    GW_HWNDFIRST = 0
    GW_HWNDLAST = 1
    GW_HWNDNEXT = 2
    GW_HWNDPREV = 3
    GW_OWNER = 4
    GW_CHILD = 5
    GW_ENABLEDPOPUP = 6
    GW_MAX = 6
End Enum

Notes:

None.