Question

MSDN文档：

http://msdn.microsoft.com/en-us/library/ms724897(VS.85).aspx

奇怪的是这个函数可能会返回什么错误。

如果密钥不存在，我对返回的错误代码特别感兴趣，但更全面的信息也会很好。

Answer 1

这是标准的Win32内核错误代码。 GetLastError（）返回的代码类型，因此可以在WinError.h中找到可能值的集合。请注意，这些是不是 HRESULT值。

//  The configuration registry database is corrupt.
//
#define ERROR_BADDB                      1009L

//  The configuration registry key is invalid.
//
#define ERROR_BADKEY                     1010L

//  The configuration registry key could not be opened.
//
#define ERROR_CANTOPEN                   1011L

//  The configuration registry key could not be read.
//
#define ERROR_CANTREAD                   1012L

//  The configuration registry key could not be written.
//
#define ERROR_CANTWRITE                  1013L

//  One of the files in the registry database had to be recovered by use of a log or alternate copy. The recovery was successful.
//
#define ERROR_REGISTRY_RECOVERED         1014L

//  The registry is corrupted. The structure of one of the files containing registry data is corrupted, or the system's memory image of the file is corrupted, or the file could not be recovered because the alternate copy or log was absent or corrupted.
//
#define ERROR_REGISTRY_CORRUPT           1015L

//  An I/O operation initiated by the registry failed unrecoverably. The registry could not read in, or write out, or flush, one of the files that contain the system's image of the registry.
//
#define ERROR_REGISTRY_IO_FAILED         1016L

//  The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format.
//
#define ERROR_NOT_REGISTRY_FILE          1017L

//  Illegal operation attempted on a registry key that has been marked for deletion.
//
#define ERROR_KEY_DELETED                1018L

//  System could not allocate the required space in a registry log.
//
#define ERROR_NO_LOG_SPACE               1019L

//  Cannot create a symbolic link in a registry key that already has subkeys or values.
//
#define ERROR_KEY_HAS_CHILDREN           1020L

//  Cannot create a stable subkey under a volatile parent key.
//
#define ERROR_CHILD_MUST_BE_VOLATILE     1021L

RegOpenKeyEx中可能出现的错误代码的完整列表非常大，可能会随着每个版本的Windows而改变，您应该准备好处理任何Win32错误代码。

编辑：显然，不存在的键的错误是ERROR_FILE_NOT_FOUND。

Answer 2

为什么不直接尝试并在调试器中查看它返回的内容？

在Visual Studio调试器中，您只需输入

即可

$err

查看上次执行函数的错误代码，

$err,hr

以全文查看最后一个错误。

Answer 3

ERROR_FILE_NOT_FOUND
    2 (0x2)
    The system cannot find the file specified.

gdunbar已经注意到了。

我刚遇到

ERROR_BAD_PATHNAME
    161 (0xA1)
    The specified path is invalid.

错误地使用了以'\\'字符开头的路径名。

RegOpenKeyEx失败时会返回什么错误代码？

3 个答案: