The environment variable information associated with the output process (using Getenvironmentstrings to get information, and then using Stringcchcopyn and stringcchprintf to ensure that the string does not cross)

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2. void Dumpenvironmentstrings ()
4. {
6. #define MAX_ENVIRONMENT_NAME_LENGTH (128)
8. #define MAX_ENVIRONMENT_VALUE_LENGTH (1024)
10. LPTSTR lpszenvstring = getenvironmentstrings ();
12. if (NULL = = lpszenvstring)
14. {
16. return;
18. }
22. tchar* penvblock = lpszenvstring;
24. Const TCHAR sztoken = _t (' = ');
26. TCHAR Szname[max_environment_name_length] = {0};
28. TCHAR Szvalue[max_environment_value_length] = {0};
30. While (' *penvblock '! =)
32. {
34. if (Sztoken = = *penvblock)
36. {
38. Penvblock + = _tcslen (penvblock) + 1;
40. continue;
42. }
44. tchar* PToken = _TCSCHR (Penvblock, Sztoken);
46. if (NULL = = PToken)
48. {
50. Break ;
52. }
54. memset (szName, 0, sizeof (szName));
56. memset (szvalue, 0, sizeof (szvalue));
58. Stringcchcopyn (SzName, _countof (szName), Penvblock, Ptoken-penvblock);
60. stringcchprintf (Szvalue, _countof (szvalue), _t ("%s"), PToken + 1);
62. _tprintf (_t ("%s:%s\r\n\r\n"), SzName, szvalue);
64. Penvblock + = _tcslen (penvblock) + 1;
66. }
68. Freeenvironmentstrings (lpszenvstring);
70. lpszenvstring = NULL;
72. }
76. Test code
78. #include "stdafx.h"
80. #include <Windows.h>
82. #include <strsafe.h>
86. int _tmain (int argc, _tchar* argv[])
88. {
90. Dumpenvironmentstrings ();
92. return 0;
94. }

http://blog.csdn.net/visualeleven/article/details/8122081

The environment variable information associated with the output process (using Getenvironmentstrings to get information, and then using Stringcchcopyn and stringcchprintf to ensure that the string does not cross)