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分享为什么我用GetUserName（char*,unsigned long*），返回值总是0？
为什么我用GetUserName（char*,unsigned long*），返回值总是0？
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rdqjuven 2004-08-31
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我只想得到当前登录的用户名，该怎么做啊？
mintwlf 2004-08-31
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你是不是要得到操作系统的用户名和密码啊？
你就这样肯定是不行的啦！先从TOKEN开始研究吧！
你就这样肯定是不行的啦！先从TOKEN开始研究吧！
rdqjuven 2004-08-31
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顶一下
rdqjuven 2004-08-31
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求助！
rdqjuven 2004-08-31
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不懂，什么意思？
DoubleJiang 2004-08-31
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GetUserName
The GetUserName function retrieves the user name of the current thread. This is the name of the user currently logged onto the system.
BOOL GetUserName(
LPTSTR lpBuffer, // address of name buffer
LPDWORD nSize // address of size of name buffer
);
Parameters
lpBuffer
Pointer to the buffer to receive the null-terminated string containing the user's logon name. If this buffer is not large enough to contain the entire user name, the function fails. A buffer size of (UNLEN + 1) characters will hold the maximum length user name including the terminating null character. UNLEN is defined in LMCONS.H.
nSize
Pointer to a DWORD variable that, on input, specifies the maximum size, in characters, of the buffer specified by the lpBuffer parameter. If the function succeeds, the variable receives the number of characters copied to the buffer. If the buffer is not large enough, the function fails and the variable receives the required buffer size, in characters, including the terminating null character.
Return Values
If the function succeeds, the return value is nonzero, and the variable pointed to by nSize contains the number of characters copied to the buffer specified by lpBuffer, including the terminating null character.
If the function fails, the return value is zero. To get extended error information, callGetLastError.
Remarks
If the current thread is impersonating another client, the GetUserName function returns the user name of the client that the thread is impersonating.
QuickInfo
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in winbase.h.
Import Library: Use advapi32.lib.
Unicode: Implemented as Unicode and ANSI versions on Windows NT.
See Also
System Information Overview, System Information Functions,LookupAccountName
The GetUserName function retrieves the user name of the current thread. This is the name of the user currently logged onto the system.
BOOL GetUserName(
LPTSTR lpBuffer, // address of name buffer
LPDWORD nSize // address of size of name buffer
);
Parameters
lpBuffer
Pointer to the buffer to receive the null-terminated string containing the user's logon name. If this buffer is not large enough to contain the entire user name, the function fails. A buffer size of (UNLEN + 1) characters will hold the maximum length user name including the terminating null character. UNLEN is defined in LMCONS.H.
nSize
Pointer to a DWORD variable that, on input, specifies the maximum size, in characters, of the buffer specified by the lpBuffer parameter. If the function succeeds, the variable receives the number of characters copied to the buffer. If the buffer is not large enough, the function fails and the variable receives the required buffer size, in characters, including the terminating null character.
Return Values
If the function succeeds, the return value is nonzero, and the variable pointed to by nSize contains the number of characters copied to the buffer specified by lpBuffer, including the terminating null character.
If the function fails, the return value is zero. To get extended error information, callGetLastError.
Remarks
If the current thread is impersonating another client, the GetUserName function returns the user name of the client that the thread is impersonating.
QuickInfo
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in winbase.h.
Import Library: Use advapi32.lib.
Unicode: Implemented as Unicode and ANSI versions on Windows NT.
See Also
System Information Overview, System Information Functions,LookupAccountName
DoubleJiang 2004-08-31
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看看 GetLastError()
