为啥报错误函数未定义

我在做一个控制NTFS文件夹权限的 vc project
东查西找,
AddAccessAllowedAce
SetSecurityDescriptorDacl
SetFileSecurity
用这些API可以搞定.
但是发现生成的权限只是对文件夹本身生效.而不是我所期望的文件夹与子文件夹及子文件
后来发现 AddAccessAllowedAceEx 这个函数支持这个参数.
改好代码后,一编译,说这个函数未声明.
奇怪啊,我又 #include  还是不管用.
最后一研究.该函数必须要 WINNT 5.0 以上才支持的,也就是说
要在 stdafx.h 的最开头,添加如下一句
 #define _WIN32_WINNT 0x0500
表示你所编译的是系统内核是NT 5.0以上的,就OK了.(也就是win2000以上的系统,非win98以下)
类似这样的函数很多.其实,要仔细一点就会发现,在msdn中有这么一行隔膜计量泵说明.
QuickInfo

  Windows NT: Requires version 5.0 or later.
有时,登录的用户名是带有域名的,比如说 mydomain\user1
但是如果调用 GetUserName,则不论你是登录的本机,还是登录的域,获取的都是user1,而不能获得域名.
GetUserNameEx这个函数,就可以获得全名称.
不过,如果是在vc6情况下,就没办法直接使用这个函数了,我尝试将隔膜计量泵对应的.h和.lib复制过来,却总是不行.最后想到的一招还是使用LoadLibrary/GetProcAddres

typedef enum
{
    // Examples for the following formats assume a fictitous company
    // which hooks into the global X.500 and DNS name spaces as follows.
    //
    // Enterprise root domain in DNS is
    //
    //      widget.com
    //
    // Enterprise root domain in X.500 (RFC 1779 format) is
    //
    //      O=Widget, C=US
    //
    // There exists the child domain
    //
    //      engineering.widget.com
    //
    // equivalent to
    //
    //      OU=Engineering, O=Widget, C=US
    //
    // There exists a container within the Engineering domain
    //
    //      OU=Software, OU=Engineering, O=Widget, C=US
    //
    // There exists the user
    //
    //      CN=John Doe, OU=Software, OU=Engineering, O=Widget, C=US
    //
    // And this user's downlevel (pre-ADS) user name is
    //
    //      Engineering\JohnDoe

    // unknown name type
    NameUnknown = 0,

    // CN=John Doe, OU=Software, OU=Engineering, O=Widget, C=US
    NameFullyQualifiedDN = 1,

    // Engineering\JohnDoe
    NameSamCompatible = 2,

    // Probably "John Doe" but could be something else.  I.e. The
    // display name is not necessarily the defining RDN.
    NameDisplay = 3,


    // String-ized GUID as returned by IIDFromString().
    // eg: {4fa050f0-f561-11cf-bdd9-00aa003a77b6}
    NameUniqueId = 6,

    // engineering.widget.com/software/John Doe
    NameCanonical = 7,

    // [email protected]
    NameUserPrincipal = 8,

    // Same as NameCanonical except that rightmost '/' is
    // replaced with '\n' - even in domain-only case.
    // eg: engineering.widget.com/software\nJohn Doe
    NameCanonicalEx = 9,http://www.tju.edu.cn/

    // www/srv.engineering.com/engineering.com
    NameServicePrincipal = 10,

    // DNS domain name + SAM username
    // eg: engineering.widget.com\JohnDoe
    NameDnsDomain = 12

} EXTENDED_NAME_FORMAT, * PEXTENDED_NAME_FORMAT;

typedef  BOOLEAN  (SEC_ENTRY *MYGETUSERNAMEEX) (EXTENDED_NAME_FORMAT,LPSTR,PULONG);

 char buffer[200];
 ULONG len=200;

 HINSTANCE LibHandle;
 LibHandle = LoadLibrary("secur32.dll");
 if( LibHandle )
 {
  MYGETUSERNAMEEX func;
  func = (MYGETUSERNAMEEX)GetProcAddress(LibHandle,"GetUserNameExA");
  if( func )
  {
   (func)(NameSamCompatible,buffer,&len);
   AfxMessageBox(buffer);

转载于:https://www.cnblogs.com/shhxpump/p/3738445.html

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