# File lib/guid.rb, line 39
39:     def initialize
40:       hProvStr = " " * 4
41:       if CryptAcquireContext.call(hProvStr, nil, nil, PROV_RSA_FULL,
42:                                   CRYPT_VERIFYCONTEXT) == 0
43:         raise SystemCallError, "CryptAcquireContext failed: #{lastErrorMessage}"
44:       end
45:       hProv, = hProvStr.unpack('L')
46:       @bytes = " " * 16
47:       if CryptGenRandom.call(hProv, 16, @bytes) == 0
48:         raise SystemCallError, "CryptGenRandom failed: #{lastErrorMessage}"
49:       end
50:       if CryptReleaseContext.call(hProv, 0) == 0
51:         raise SystemCallError, "CryptReleaseContext failed: #{lastErrorMessage}"
52:       end
53:     end