使用 GetComputerObjectNameW win API 时出现编译错误

Question

我在 Visual Studio 上收到以下代码的编译错误。请帮助我理解问题。 如果您没有 Visual Studio，您可以尝试通过以下链接编译代码 https://rextester.com/l/cpp_online_compiler_visual

#include <iostream>
#include <atlbase.h>
#include <secext.h>


int main()
{
        EXTENDED_NAME_FORMAT enf = NameFullyQualifiedDN;
        LPWSTR pwszComputerName;
        DWORD dwLen;
        
        dwLen = 0;
        GetComputerObjectNameW(enf, NULL, &dwLen);
    
        pwszComputerName = new WCHAR[dwLen + 1];
        if(NULL == pwszComputerName)
        {
            return 0;
        }
        if(!GetComputerObjectNameW(NameSamCompatible, pwszComputerName, &dwLen))
        {
            delete pwszComputerName;
            return 0;
        }

        sbstrTrustee = pwszComputerName;
        wprintf(L"GetComputerObjectName: %s\n", pwszComputerName);
        delete pwszComputerName;
        return 0
}

错误如下。

C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(117): error C2146: syntax error: missing ';' before identifier 'GetUserNameExA'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(121): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(126): error C2086: 'BOOLEAN SEC_ENTRY': redefinition
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(117): note: see declaration of 'SEC_ENTRY'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(126): error C2146: syntax error: missing ';' before identifier 'GetUserNameExW'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(130): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(140): error C2086: 'BOOLEAN SEC_ENTRY': redefinition
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(117): note: see declaration of 'SEC_ENTRY'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(140): error C2146: syntax error: missing ';' before identifier 'GetComputerObjectNameA'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(144): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(147): error C2086: 'BOOLEAN SEC_ENTRY': redefinition
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(117): note: see declaration of 'SEC_ENTRY'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(147): error C2146: syntax error: missing ';' before identifier 'GetComputerObjectNameW'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(151): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(161): error C2086: 'BOOLEAN SEC_ENTRY': redefinition
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(117): note: see declaration of 'SEC_ENTRY'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(161): error C2146: syntax error: missing ';' before identifier 'TranslateNameA'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(167): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(170): error C2086: 'BOOLEAN SEC_ENTRY': redefinition
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(117): note: see declaration of 'SEC_ENTRY'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(170): error C2146: syntax error: missing ';' before identifier 'TranslateNameW'
C:\Program Files (x86)\Windows Kits\8.1\include\\shared\secext.h(176): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
source_file.cpp(28): error C2065: 'sbstrTrustee': undeclared identifier
Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23506 for x64

Answer 1

这段代码有几个错误：

1. 您应该包含security.h 而不是secext.h（请参阅including secExt.h causes errors）。
2. 您必须定义SECURITY_WIN32、SECURITY_KERNEL 或SECURITY_MAC 之一（请参阅SSPI header file - fatal error）。
3. sbstrTrustee 变量未声明。
4. return 0 语句后没有;。

假设您的应用程序是用户模式窗口，代码可能如下：

#define SECURITY_WIN32 
#include <iostream>
#include <atlbase.h>
#include <security.h>

int main()
{
  EXTENDED_NAME_FORMAT enf = NameFullyQualifiedDN;
  LPWSTR pwszComputerName;
  DWORD dwLen;

  dwLen = 0;
  GetComputerObjectNameW(enf, NULL, &dwLen);

  pwszComputerName = new WCHAR[dwLen + 1];
  if (NULL == pwszComputerName)
  {
    return 0;
  }
  if (!GetComputerObjectNameW(NameSamCompatible, pwszComputerName, &dwLen))
  {
    delete pwszComputerName;
    return 0;
  }

  //sbstrTrustee = pwszComputerName;
  wprintf(L"GetComputerObjectName: %s\n", pwszComputerName);
  delete pwszComputerName;
  return 0;
}

您还必须链接Secur32.lib。