C / C++ / MFC

how to get drive list without using COM?

5-Nov-12 3:19

You just need to add some extra information to your message, which the server can use to forward it on to a different client. Alternatively make each system into a server and client so they can talk to any other machine. I don't know anything about WCF but that may offer some options.

One of these days I'm going to think of a really clever signature.

Re: client server query

CPallini5-Nov-12 10:47

CPallini

5-Nov-12 10:47

Have a look at: Wikipedia's "Peer-to-peer" page[^].

Veni, vidi, vici.

Le@rner4-Nov-12 23:15

4-Nov-12 23:15

hi all,

can anybody help me to get physical drive list and details without using the COM.

thanks.

Santhosh G_4-Nov-12 23:37

Santhosh G_

4-Nov-12 23:37

Please use GetLogicalDriveStrings() or GetLogicalDrives().
GetDriveType() can be used to get details of the drive.
GetDiskFreeSpace() can be used to retreive information about the specified disk, including the amount of free space on the disk.

Le@rner4-Nov-12 23:41

4-Nov-12 23:41

i want to get list of physical drives not the Logical Drives...

Sajeesh Payolam5-Nov-12 2:28

Sajeesh Payolam

5-Nov-12 2:28

GetLogicalDrives() enumerates all mounted disk partitions, not physical drives.

You can enumerate the drive letters with (or without) GetLogicalDrives, then call QueryDosDevice() to find out which physical drive the letter is mapped to.

Alternatively, you can decode the information in the registry at HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices
stackoverflow answer.

coinitializesecurity failed with error code 800706ba !

David Crow5-Nov-12 2:48

David Crow

5-Nov-12 2:48

Have you considered DeviceIoControl(IOCTL_DISK_GET_PARTITION_INFO)?

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Le@rner4-Nov-12 17:33

Re: coinitializesecurity failed with error code 800706ba !

4-Nov-12 17:33

Hi all,

CoInitialize(NULL);

hres =  CoInitializeSecurity(
	    NULL, 
	    -1,                          // COM authentication
	    NULL,                        // Authentication services
	    NULL,                        // Reserved
	    RPC_C_AUTHN_LEVEL_DEFAULT,   // Default authentication 
	    RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation  
	    NULL,                        // Authentication info
	    EOAC_NONE,                   // Additional capabilities 
	    NULL                         // Reserved
	   );
	                  
	if (FAILED(hres))
	{	
                CString str=_T("");
		str.Format(_T("Failed to initialize security. Error code = %0x"),hres);
        }

here coinitializesecurity failed with error code 800706ba.

please help how can i resolve this why this error comes

thanks...

Jochen Arndt4-Nov-12 21:42

Jochen Arndt

4-Nov-12 21:42

First to know is the error message for that code. 0x8007xxxx codes are just the same as 'normal' Windows error codes (the highest bit is the error bit and 7 is the Win32 facility). So passing 0x6BA to ::FormatMessage() gives us the error message:

The RPC server is unavailable.

Now you can use Google to find solutions. The first result is Troubleshooting "The RPC server is unavailable"[^]

Re: coinitializesecurity failed with error code 800706ba !

Richard MacCutchan4-Nov-12 21:45

Re: coinitializesecurity failed with error code 800706ba !

4-Nov-12 21:45

Did you check to see what that error code means? It suggests that some service required for this call is not available. Check the documentation[^] for further details.

One of these days I'm going to think of a really clever signature.

Le@rner4-Nov-12 23:43

Re: coinitializesecurity failed with error code 800706ba !

4-Nov-12 23:43

please help me to solve this...

Richard MacCutchan5-Nov-12 3:10

Why the CTreeCtrl disable[solved]

5-Nov-12 3:10

Solve what? I have no idea what is happening in your system except that a system call gives you an error code. You need to do some diagnosis (and probably some Google searching) to discover why this happens. Have you checked that all the parameters are correct on your call to CoInitializeSecurity()?

One of these days I'm going to think of a really clever signature.

yu-jian4-Nov-12 4:59

yu-jian

4-Nov-12 4:59

When user click the item of the CListCtrl, I create a CTreeCtrl dynamicly to let use the data,

but the CTreeCtrl is disabled, I do not know why.
Is there anyone know why it is.

modified 15-Jan-13 10:31am.

Richard MacCutchan4-Nov-12 5:13

4-Nov-12 5:13

yu-jian wrote:
but the CTreeCtrl is disabled, I do not know why. Is there anyone know why it is.

Without seeing some of your code we cannot even begin to guess what may be happening.

One of these days I'm going to think of a really clever signature.

yu-jian4-Nov-12 15:28

yu-jian

4-Nov-12 15:28

Sorry

CPoint point;
GetCursorPos(&point);
this->ScreenToClient(&point);
CRect  rect;
rect.top = point.y;
rect.left = point.x;
rect.right = rect.left + 200;
rect.bottom = rect.top  + 300;

CComboBox* pComboBox = new CComboBox();
pComboBox->Create(WS_VISIBLE, rect, this, NULL);
pComboBox->ShowWindow(SW_SHOW);

CDeviceInfoArray  arrDeviceInfo;
          ...

    for(int i = 0; i < arrDeviceInfo.GetCount(); ++i)
    {
        CString  strDevice;
        strDevice.Format("%d", arrDeviceInfo[i]);

        pComboBox->AddString(strDevice);
    }

David Crow4-Nov-12 16:18

David Crow

4-Nov-12 16:18

Is your CTreeCtrl being disguised as a CComboBox? Confused | :confused:

yu-jian4-Nov-12 16:35

yu-jian

4-Nov-12 16:35

Firstly, I use the CTreeCtrl, but failed, then I use the CComboBox, but also failed, too.

I thought that it's the same problem.

Richard MacCutchan4-Nov-12 21:22

4-Nov-12 21:22

I don't know what this has to do with a tree control, but your Create() call is missing some windows styles (specifically WS_CHILD), and your control does not have an id. See the documentation[^] for more details.

One of these days I'm going to think of a really clever signature.

chaau4-Nov-12 10:57

chaau

4-Nov-12 10:57

At least show us the code you use to create the Tree Control

how can i set modem speed when i create rasdial entry.

Sajeesh Payolam4-Nov-12 19:42

Sajeesh Payolam

4-Nov-12 19:42

please show your CTreeListCtrl creation code. without seeing code how we can predict issue? Wink | ;)

dolpari7013-Nov-12 22:03

dolpari701

3-Nov-12 22:03

Hi All.
I need to your help in blow questions..

I have to use internet over GPRS modem in windows xp and windows 7, so i have created a dial-up connection using Rasdial API

But i get some problems.
that is, when i creat Ras entry by RasSetEntryProperties api, the entry come up with the default maximum speed of 115200 (but i must use other baud rate, for example, 7200000) .

I can edit this manually in the modem settings, but dose anyone know the API's i can use to set it in code?

I don't want to modify registry about modem.

I have looked through the MDSN, but RasSetEntryProperties function dosen't do it, and it says, lpbDeviceInfo param is unused in Windows XP.

Are there any other solutions except modify registry before making ras entry?

Sorry for my bad english.

Regards.

Lock a file

Iain Wiseman3-Nov-12 16:46

Iain Wiseman

3-Nov-12 16:46

This looked easy but it wasn't

I want to

1/ Test if I have rights to delete a file
2/ lock it
3/ read it
4/ delete it

This is all in one process

Gave up on 1/ but tried to use CreateFile to lock it and found xerces-c was not able to access the file for reading in the same process.

Any pointers (no pun intended). Not .net just C++/Win32

Thanks
Iain

Re: Lock a file

Richard MacCutchan3-Nov-12 21:25