CreateIconFromResourceEx

[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr CreateIconFromResourceEx(
   byte[] presbits,
   uint dwResSize,
   [MarshalAs(UnmanagedType.Bool)] bool fIcon,
   uint dwVer,
   int cxDesired,
   int cyDesired,
   uint uFlags
);

Microsoft documentation: Link