C / C++ / MFC

26-Nov-09 15:02

Hi,

Given a Mapped Drive i.e.'F:\' Is itpossible to recover the Server Name and Path .

Regards,

Bram van Kampen

Garth J Lancaster26-Nov-09 16:51

26-Nov-09 16:51

I thought the information was available in the 'Netshare' API's - these days its likely to be available through WMI as well - if only a bit more convoluted to access

'g'

See this ..

Garth J Lancaster26-Nov-09 16:57

26-Nov-09 16:57

http://www.codeguru.com/cpp/i-n/network/basicnetworkoperations/article.php/c5429/[^]

Might even have been posted here on CP - GetUNC may be what you're looking for

'g'

T210226-Nov-09 19:33

T2102

26-Nov-09 19:33

You also can read the RemotePath key in HKEY_CURRENT_USER\Network\DRIVE_LETTER to get the mapping information

Garth J Lancaster26-Nov-09 19:47

26-Nov-09 19:47

Thanks for that info - filed away for future use

'G'/Remote/via Blackberry

Bram van Kampen28-Nov-09 13:03

28-Nov-09 13:03

Thanks.

I used this to write an "API" as follows:-

<br />
SGAPI BOOL GetUNCA(LPCSTR DriveSpec, LPSTR pstrResult,LPDWORD pcbSize){<br />
       if((DriveSpec==NULL)||(pstrResult==NULL)||(pcbSize==NULL)){<br />
          SetLastError(ERROR_INVALID_PARAMETER);<br />
          return FALSE;<br />
         }<br />
        if(strlen(DriveSpec)!=3){<br />
               SetLastError(ERROR_BAD_FORMAT);<br />
               return FALSE;<br />
        }<br />
        if((DriveSpec[1]!=':')||(DriveSpec[2]!='\\')){<br />
                SetLastError(ERROR_BAD_FORMAT);<br />
                return FALSE;<br />
        }<br />
<br />
        char ch=toupper(DriveSpec[0]);<br />
        if((ch<'A')||(ch>'Z')){<br />
                SetLastError(ERROR_BAD_FORMAT);<br />
                return FALSE;<br />
        }<br />
        CString SubKey="Network\\";<br />
	SubKey+=ch;<br />
<br />
        HKEY hkResult;<br />
        if(RegOpenKeyExA(HKEY_CURRENT_USER,SubKey,NULL,NULL,&hkResult)!=ERROR_SUCCESS){<br />
<br />
                SetLastError(ERROR_INVALID_CATEGORY);<br />
                return FALSE;<br />
        }<br />
<br />
        DWORD Type=REG_SZ;<br />
        DWORD dwRes=RegQueryValueExA(hkResult,"RemotePath",NULL,&Type,(LPBYTE)pstrResult,pcbSize);<br />
        RegCloseKey(hkResult);<br />
<br />
        if(dwRes==ERROR_SUCCESS)return TRUE;<br />
		<br />
        SetLastError(ERROR_INVALID_CATEGORY);<br />
<br />
        return FALSE;<br />
}<br />

One of the Things is: How do those Subkeys Translate in Foreign Languages... ???

Thanks A lot for the Info Smile | :)

Bram van Kampen

Bram van Kampen28-Nov-09 13:06

28-Nov-09 13:06

hmmm!

GetUNC is a Commandline Utility. Maybe as a Last Resort.

Thanks for your comment though. Smile | :)

Regards,

Bram van Kampen

Garth J Lancaster28-Nov-09 13:22

28-Nov-09 13:22

the CNetservice I showed from CodeGuru is NOT a command line utility - why would I have shown you something sooo useless, hmmmm ???

If you look for CNetService by Jay Wheeler, and get the download, you'll see GetUNC() uses APU WNetGetUniversalName

I was thinking one of is crazy, glad its not me, ok, for once Wink | ;-)

'g'

Bram van Kampen29-Nov-09 14:15

29-Nov-09 14:15

Hi,

Garth J Lancaster wrote:
the CNetservice I showed from CodeGuru is NOT a command line utility - why would I have shown you something sooo useless, hmmmm ??

Well, that's what the link appeared to be pointed to. I asked myself the same question.

Garth J Lancaster wrote:
If you look for CNetService by Jay Wheeler, and get the download, you'll see GetUNC() uses APU WNetGetUniversalName

I was thinking one of is crazy, glad its not me, ok, for once

Well maybe the gremlins...
Found that site, its very usefull.

Thanks. Smile | :)

Bram van Kampen

Randor 27-Nov-09 15:23

Randor

27-Nov-09 15:23

Hi Bram,

Are you looking for the WNetGetUniversalName Function[^]?

Best Wishes,
-David Delaune

Bram van Kampen28-Nov-09 12:54

28-Nov-09 12:54

Bingo!

Just the Ticket. Thanks.

As a Side Line, The MS Windows API is growing that wide that even googeling, or MSDN becomes difficult, if you don't remember the name of an API in the first place. Many of the 10,000 or so Microsoft engineers seem to be having the same problem. They have another weapon though, access to the windows code, and it occurs to me that if they cannot find quikly what they need, that they just introduce another API to add to the pile.

In the mean time I wrote:

<br />
     SGAPI BOOL GetUNC(LPCSTR DriveSpec, LPSTR pstrResult,LPDWORD pcbSize)<br />

based on the previous replies. That was not difficult, but WNetGetUniversalName() is more universal, and less likely to break in future versions.

Thanks, Smile | :)

Bram van Kampen

Garth J Lancaster28-Nov-09 13:23

28-Nov-09 13:23

rats - he beat me to it - see my prev response - lest you got there in the end - have fun Smile | :)

'g'

Bram van Kampen28-Nov-09 14:27

28-Nov-09 14:27

Hi,

BTW.

That Reg Entry. If you delete that, does that 'Undo' Drive mapping. I know of no way to 'Unmap' a drive in XP. Does not bother me much, I never realy use this 'Drive Mapping Feature' I personally think that it is a leftover from the DOS days, (maybe you don't remember those)
Those where the days that God was with us in Paradise, and all of us had Floppies. Lo and Behold, Someone invented the CD. Everybody took a step back and admired in awe, and all those guru's, came up with further int14's and complicated code, to assign those horrid things a drive letter, using a device called MSCDEX, etc. Afterall, DOS could only deal with Block devices if they had a Drive Letter, so a drive letter it got.

Then some Nasty bugger invented Networking! Not to worry, MS had already a Mechanism to map Drives... Just another Interrupt, And, Presto, we had 'Share', with, guess it... A Drive Letter!

Me thinks, No real need for all that crap. UNC Names are about as good as it gets.

The problem occurs, where XP supports this anachronism. Some of my customers use Network Shares assigned to a Mapped Drive. Over Time, Things break, and I have to unravel the mess in a Fix, but, Idealy trap it during the Setup.

Thanks for your Contribution.

Regards Smile | :)

Bram van Kampen

Garth J Lancaster28-Nov-09 14:35