C# program to GetUserNameEx

[asibin2000]

Can you use C# to run a function like GetUserNameEX - similar to the following code?

#include <windows.h>
#include <tchar.h>
#include <stdio.h>

TCHAR* envVarStrings[] =
{
TEXT("OS = %OS%"),
TEXT("PATH = %PATH%"),
TEXT("HOMEPATH = %HOMEPATH%"),
TEXT("TEMP = %TEMP%")
};
#define ENV_VAR_STRING_COUNT (sizeof(envVarStrings)/sizeof(TCHAR*))
#define INFO_BUFFER_SIZE 32767
void printError( TCHAR* msg );

void main( )
{
DWORD i;
TCHAR infoBuf[INFO_BUFFER_SIZE];
DWORD bufCharCount = INFO_BUFFER_SIZE;

// Get and display the name of the computer.
bufCharCount = INFO_BUFFER_SIZE;
if( !GetComputerName( infoBuf, &bufCharCount ) )
printError( TEXT("GetComputerName") );
_tprintf( TEXT("\nComputer name: %s"), infoBuf );

// Get and display the user name.
bufCharCount = INFO_BUFFER_SIZE;
if( !GetUserName( infoBuf, &bufCharCount ) )
printError( TEXT("GetUserName") );
_tprintf( TEXT("\nUser name: %s"), infoBuf );

// Get and display the system directory.
if( !GetSystemDirectory( infoBuf, INFO_BUFFER_SIZE ) )
printError( TEXT("GetSystemDirectory") );
_tprintf( TEXT("\nSystem Directory: %s"), infoBuf );

// Get and display the Windows directory.
if( !GetWindowsDirectory( infoBuf, INFO_BUFFER_SIZE ) )
printError( TEXT("GetWindowsDirectory") );
_tprintf( TEXT("\nWindows Directory: %s"), infoBuf );

// Expand and display a few environment variables.
_tprintf( TEXT("\n\nSmall selection of Environment Variables:") );
for( i = 0; i < ENV_VAR_STRING_COUNT; ++i )
{
bufCharCount = ExpandEnvironmentStrings(envVarStrings, infoBuf,
INFO_BUFFER_SIZE );
if( bufCharCount > INFO_BUFFER_SIZE )
_tprintf( TEXT("\n\t(Buffer too small to expand: \"%s\")"),
envVarStrings );
else if( !bufCharCount )
printError( TEXT("ExpandEnvironmentStrings") );
else
_tprintf( TEXT("\n %s"), infoBuf );
}
}

void printError( TCHAR* msg )
{
DWORD eNum;
TCHAR sysMsg[256];
TCHAR* p;

eNum = GetLastError( );
FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, eNum,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
sysMsg, 256, NULL );

// Trim the end of the line and terminate it with a null
p = sysMsg;
while( ( *p > 31 ) || ( *p == 9 ) )
++p;
do { *p-- = 0; } while( ( p >= sysMsg ) &&
( ( *p == '.' ) || ( *p < 33 ) ) );

// Display the message
_tprintf( TEXT("\n\t%s failed with error %d (%s)"),
msg, eNum, sysMsg );
}

We are trying to use functions in the win api / kernel32 but call them from a C# application.

 

[MadJock]

Hi,

Good place to start is

http://www.pinvoke.net.

There are other ways to get the username though -

System.Environment.UserName

Hopte this helps,

Graeme

"Just beacuse you're paranoid, don't mean they're not after you