[DllImport("Kernel32.dll", EntryPoint = "SizeofResource", SetLastError = true)]

    private static extern uint SizeofResource(IntPtr hModule, IntPtr hResource);

    uint resSize = SizeofResource(IntPtr.Zero, resH1);

static extern uint SizeofResource(IntPtr hModule, IntPtr hResInfo);

Private Shared Function SizeofResource(hModule As IntPtr, hResInfo As IntPtr) As UInteger