How to Look Up a User's Full Name
Computers running Windows can be organized into a domain, which is a
collection of computers on a Windows NT Server network. The domain administrator
maintains centralized user and group account information.
To find the full name of a user, given the user name and domain name on
Windows NT:
- Convert the user name and domain name to Unicode, if they are not already
Unicode strings.
- Look up the computer name of the domain controller (DC) by calling NetGetDCName.
- Look up the user name on the DC computer by calling NetUserGetInfo.
- Convert the full user name to ANSI, unless the program is expecting to work
with Unicode strings.
The following sample code is a function that takes a user name and a domain
name in the first two arguments and returns the user's full name in the third
argument.
#include <windows.h>
#include <lm.h>
#include <stdio.h>
BOOL GetFullName( char *UserName, char *Domain, char *dest )
{
WCHAR wszUserName[256]; // Unicode user name
WCHAR wszDomain[256];
LPBYTE ComputerName;
struct _SERVER_INFO_100 *si100; // Server structure
struct _USER_INFO_2 *ui; // User structure
// Convert ANSI user name and domain to Unicode
MultiByteToWideChar( CP_ACP, 0, UserName,
strlen(UserName)+1, wszUserName, sizeof(wszUserName) );
MultiByteTOWideChar( CP_ACP, 0, Domain,
strlen(Domain)+1, wszDomain, sizeof(wszDomain) );
// Get the computer name of a DC for the domain.
NetGetDCName( NULL, wszDomain, &ComputerName );
// Look up the user on the DC.
if( NetUserGetInfo( (LPWSTR) ComputerName,
(LPWSTR) &wszUserName, 2, (LPBYTE *) &ui ) )
{
printf( "Error getting user information.\n" );
return( FALSE );
}
// Convert the Unicode full name to ANSI.
WideCharToMultiByte( CP_ACP, 0, ui->usri2_full_name, -1,
dest, 256, NULL, NULL );
return (TRUE);
}
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