Using WINNT variables in app.

This is a discussion on Using WINNT variables in app. within the Windows Programming forums, part of the Platform Specific Boards category; In Windows NT you can use %USERNAME% and %COMPUTERNAME% in scripts, extracting this info off of PCs. I need to ...

  1. #1
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    Exclamation Using WINNT variables in app.

    In Windows NT you can use %USERNAME% and %COMPUTERNAME% in scripts, extracting this info off of PCs. I need to do the same thing in my simple C++ program. Basically, I need to do this:

    char *thisComputer = %COMPUTERNAME%;
    char *thisUser = %USERNAME%;

    YES, I *know* this isn't correct syntax, - I'm showing this to illustrate what I need my end result to do, not the actual coding itself. Does anyone know if this is possible? Or can point me in the right direction? Last night I looked through a whole bunch of header files, specifically lmaccess.h and others, but I could find what I was looking for. Thanks for ANY help guys!

    -Mark

  2. #2
    &TH of undefined behavior Fordy's Avatar
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    Code:
    #include <iostream>
    #include <windows.h>
    using namespace std;
    
    #define MAX_NAME 256
    
    
    int main()
    {
    	DWORD dwLen = MAX_NAME;
    	char lpUser[MAX_NAME],
    		 lpSystem[MAX_NAME];
    
    	GetUserName(lpUser,&dwLen);
    	GetComputerName(lpSystem,&dwLen);
    
    	cout << "User " << lpUser;
    	cout << " is logged onto " << lpSystem;
    		
    
    	return 0;
    }

  3. #3
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    Lightbulb THANKS!!!

    Thanks for the assistance! It's working great, except the lpSystem variable isn't returning the legitimate info. I've been scouring the Internet for info regarding these functions, but haven't found much "usable" info. Any ideas?

    -Mark

  4. #4
    &TH of undefined behavior Fordy's Avatar
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    Re: THANKS!!!

    Originally posted by Util_Mark
    Thanks for the assistance! It's working great, except the lpSystem variable isn't returning the legitimate info. I've been scouring the Internet for info regarding these functions, but haven't found much "usable" info. Any ideas?

    -Mark
    info @ MSDN

    Strange the API didnt get the proper PC name..............Are you sure you were expecting the correct name? The name recieved will be the name that the PC uses to identify itself on a LAN....

    The docs say the name is read from the registry.....my guess.....on Windows2000...that name would be under
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\ComputerName\ActiveComputerName

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    Arrow

    Thanks, I'll look at MSDN. I looked at your web site by the way. You know Assembly too, eh? I've always wanted to take a class on it and learn it. Thanks again,

    Mark

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    Exclamation Borland 5.02?

    Does it matter that I'm using Borland C++ version 5.02???
    Just checking...

    Mark

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    Re: Re: THANKS!!!

    Originally posted by Fordy


    info @ MSDN

    Strange the API didnt get the proper PC name..............Are you sure you were expecting the correct name? The name recieved will be the name that the PC uses to identify itself on a LAN....

    The docs say the name is read from the registry.....my guess.....on Windows2000...that name would be under
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\ComputerName\ActiveComputerName
    Can anyone suggest any other site with good network programming information?

    Mark
    Last edited by Util_Mark; 07-02-2002 at 03:42 PM.

  8. #8
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    Cross-Posting = evil, read the sticky at the very top that states the rules.
    "There are three kinds of people in the world...
    Those that can count and those that can't."

  9. #9
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    Arrow

    Sorry 'bout that, but it helped. Swoopy answered my question and it worked the first time! Thanks Swoopy! See below:

    Try this.


    code:--------------------------------------------------------------------------------
    #include <stdlib.h>
    #include <iostream>
    using namespace std;

    int main(void)
    {
    char *thisComputer;
    char *thisUser;

    thisComputer = getenv("COMPUTERNAME");
    thisUser = getenv("USERNAME");
    cout << "COMPUTER NAME:" << thisComputer << endl;
    cout << "USER NAME:" << thisUser << endl;

    return 0;
    }
    --------------------------------------------------------------------------------

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