Windows map file system - c++

Windows Explorer can associate a drive letter with a file system or directory within a file system. How do I do this from a C++ program under Windows 7 and Vista? My search of visual studio documentation and the web has not turned up API calls for doing this. Does anybody know?

The SetVolumeMountPoint function seems to do what you are after.
You'll find quite a lot of related functions (Disk Management, Volume Management, etc.) on MSDN (your best friend as a Windows developer, sometimes called "Microsoft Developer Network" or "Windows Dev Center").

Related

How to start program before login in windows in c++? [duplicate]

I've written a console program that "does stuff" - mainly using boost. How do I convert it to a Windows Service?
What should I know about Windows Services beforehand?
There's a good example on how to set up a minimal service on MSDN. See the parts about writing the main function, entry point and also the example code.
Once you've got a windows service built and running, you'll discover the next major gotcha: it's a pain to debug. There's no terminal (and hence no stdout/stderr) and as soon as you try to run the executable it actually launches the service then returns to you.
One trick I've found very useful is to add a -foreground option to your app so that if you run with that flag then it bypasses the service starter code and instead runs like a regular console app, which makes it vastly easier to debug. In VS.Net set up the debugging options to invoke with that flag.
There's a really good example on msdn here
It's a boiler plate C++ service project that has self install/uninstall functionality and logs service start and stop events to the windows event log. It can be stopped and started through the services app (snapin) like other services. You may want to initially give it LocalSystem rights to see it working , as on xp at least it doesn't have enough rights to start with the project provided rights of LocalService. The Visual Studio 2008 project otherwise runs out of the box despite the downloaded instructions implying otherwise.
A bit late but I hope this helps someone else.
You might be able to 'wrap it' using this tool from CodeProject:
http://www.codeproject.com/KB/system/xyntservice.aspx
Worth a look.
The simplest solution might be to create a new Windows Service project in Visual Studio and copy across your code to the new project.
If you refactor your code so that you've split the UI (in this case the console) from the logic you could create a library that does the work and then call that from both the Console project and the Service Project.
You can configure an application to run as a service by using the Srvany tool, which is a part of the Windows Server 2003 Resource Kit Tools.
Srvany allows only one service at same time. So I write my srvany (sFany) to make nginx and php-cgi run as windows service together. Here is the source https://github.com/stxh/sFany

visual studio removes backslash from path, generated by cmake [duplicate]

We just did a move from storing all files locally to a network drive. Problem is that is where my VS projects are also stored now. (No versioning system yet, working on that.) I know I heard of problems with doing this in the past, but never heard of a work-around. Is there a work around?
So my VS is installed locally. The files are on a network drive. How can I get this to work?
EDIT: I know what SHOULD be done, but is there a band-aid I can put on right now to fix this and maintain the network drive?
EDIT 2: I am sure I am not understanding something, but Bob King has the right idea. I'll work with the lead web developer when he gets back into the office to figure out a temporary solution until we get some sort of version control setup. Thanks for the ideas.
While we do use Source Control, we do also run all our projects from Network Drives (not shared directories, private directories on network drives). The network drives are backed up nightly, and also use Volume Shadow Copy, so if you need to revert to something before it made it's way to SC, then you can.
To get projects to run correctly with the right permission, follow these steps.
Basically, you've just got to map the shared directory to a drive, and then grant permission, based on that Url, to all code. Say you map to "N:\", then use "N:\*" as your Url pattern. It isn't obvious you need to wildcard, but you do.
The question is rather generic so I'll give an answer to one issue I was facing.
I run Visual Studio 2010 using a Parallels virtual machine on my Mac while keeping all my projects on the mac side via a network share. Visual Studio however wouldn't load the projects assembly files from there. Trying to set the rights using "caspol" alone didn't help in my case.
What finally worked for me to allow Visual Studio to load assemblies from a network share was to edit the file
"C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\devenv.exe.config" (assuming a default installation).
in the xml "<runtime>" section you have to add
<loadFromRemoteSources enabled="true"/>
You may have to change the permissions on that file to allow write access. Save the file. Restart Visual Studio.
In the interests of actually answering the question, I copied this comment from jcarle.com:
Trusting Network Shares with Visual Studio 2010 / .NET Framework v4.0
January 20, 2011, 4:10 pm
If you are like me and you store all your code on a server, you will have likely learned about trusting a network share using CasPol.exe. However, when moving from Visual Studio 2008 (.NET Framework 2.0/3.0/3.5) over to Visual Studio 2010 (.NET Framework 4.0), you may find yourself scratching your head.
If you are used to using the Visual Studio Command Prompt to quickly get to CasPol, you may find that some of your projects will not seem to respect your new FullTrust settings. The reason is that, unless you are carefully paying attention, the Visual Studio Command Prompt defaults to adding the .NET Framework 4.0 folder to its path. If your project is still running under .NET Framework 2.0/3.0/3.5, it will require setting CasPol for those versions as well. Just a note, I have also personally had more success with using 1 as a code group instead of 1.2.
To trust a network share for all versions of the .NET Framework, simply call CasPol for each version using the full path as below:
C:\Windows\Microsoft.NET\Framework\v2.0.50727\CasPol -m -ag 1 -url file://YourSharePath* FullTrust
C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol -m -ag 1 -url file://YourSharePath* FullTrust
I would not recommend doing that if you have (or even if you don't have) multiple people who are working on the projects. You're just asking for trouble.
If you're the only one working on it, on the other hand, you'll avoid much of the trouble. Performance is going to out the window, though. As far as how to get it to work, you just open the solution file from VS. You'll likely run into security issues, but can correct that using CASPOL. As I said, though, performance is going to be terrible. Again, not recommended at all.
Do yourself and your team a favor and install SVN or some other form of source control and put the code in there ASAP.
EDIT: I'll partially retract my comments. Bob King explains below the reason they run VS projects from a network drive and it makes sense. I would say unless you're doing it for a specific reason like Bob, stay away from it. Otherwise, get your ducks in a row before setting up such a development environment.
So I was having a similar issue. Visual Studio wouldn't recognize a network location I had mapped for a drive letter for anything. The funny thing is, it worked for a day. I set up my project and began working on it and had no issues. Then, I shut down and the next day nothing works. I couldn't read/write files in code, output my executables or anything. My project is local but my output was intended to be thrown up on the network.
Anyways, the problem is probably about the administrator context but one way to fix it which I found while digging around online is to get Visual Studio to browse to the drive in question some how. There are plenty of ways to do this but VS will magically be able to recognize mapped drive letters. My solution is to go the the Debug Output Location in the Project Properties, click browse and go to my previously made output location on my network drive and Voila!!!
I wanted to put this up because I spent half a day trying to figure this out and figured it might save someone else some time. Thanks much and good luck!!!
Erik
I understand this is an older thread, but this was the best thread I found when looking to solve a similar issue I had visual studio 2013 on a virtual box (using Win 8.1) and the code on the host machine (Win 7). Although I could open the solution, I could not compile. All of the other answers on this relate to older software, so I am adding this answer to update this frequently found question with the solution that worked for me.
Here's what I did; Made a registry entry to be able to use a UNC path as the current directory.
WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.
Under the registry path:
HKEY_CURRENT_USER
\Software
\Microsoft
\Command Processor
add the value DisableUNCCheck REG_DWORD and set the value to 0 x 1 (Hex).
WARNING: If you enable this feature and start a Console that has a current directory of an UNC name, start applications from that Console, and then close the Console, it could cause problems in the applications started from that Console.
Found this information at link: http://support.microsoft.com/kb/156276
How about we rephrase this into a question that everyone can answer? I have the exact same problem as the initial poster.
I have a copy of VB 2008 (recently upgraded from VB6). If I store my solutions on the backed up network drive, then it won't run a single thing ever. It gives "partially trusted caller" errors for accessing a module, even when "allowpartiallytrustedcallers" is set in the assembly. If I store the files on my (not backed up) C:, then it will run wonderfully, until I put it on the share drive for everyone to use, and I'm back to my same problem.
This isn't a big request. I just want to be able to put a solution and executable on the share drive and run it without an absurd amount of nonsense about security. I shouldn't have to cram all my work into form files.
-Edit: I found the problem with why it was ignoring the AllowPartialllyTrustedCallers command. I'm trying to reference ADODB, which doesn't allow partially trusted. So, no network executable can access a database? What does Microsoft have against intranets anyway?
I was facing the same issue just recently so this answer is more for the sake of keeping track of my own knowledge. Anyway, should soumeone find it useful, below is the issue and the solution.
Issue:
NET 4.0 projects, SVN repo, checkout folders are on local drives, referenced assemblies are build by build server and available on a network drive. Visual studio on W7 is is able to add the reference but unable to build projects.
Solution:
Since NET 4.0 does not automatically provide a sandbox anymore for network assemblies, you have to make those full-trusted via machine.config update. http://msdn.microsoft.com/en-us/library/dd409252.aspx
I had a similar problem with opening Visual Studio projects on a network drive, and I fixed it by creating a symbolic link on my local C:\ drive that points to the UNC directory
e.g.
mklink /D "C:\Users\Self\Documents" "\\domain.net\users\self\My Documents"
then you can just open the project using the C:\Users\Self\Documents\ path, instead of the UNC path
(You have to be careful, because Visual Studio will automatically redirect you to the '\\domain.net..' path if you double click the symlink when you're browsing for the project. I had to copy paste the 'C:\Users\' path to get it to open with the drive letter path)
Don't do it. If you have source control (versioning), you do not want your files on a network drive. It totally bypasses all you want to achieve by using source control, because once your files are on a network drive, anyone can modify them .... even while you're currently building your project. Ka-boooom!
PS: this sounds like a typical case of over-engineering to me.
Are you having any specific problems?
If you allow more than one person to open the solution, your first problem will be that the .NCB file (Intellisense) will be locked exclusively and only one user will be able to browse the class tree. And of course you have the potential for one user's changes to overwrite the other user's changes.
You should be warned that some feature in Visual Studio will refuse to work with network drive.
For example, mdf file of SQL Express user instance must be located in local drive.
For another example, if you use UNC path, you have to make sure they are short enought.
i found this helpful while trying use vc11 with parallels which run on mac:
http://social.msdn.microsoft.com/Forums/en-US/toolsforwinapps/thread/2ffdcb01-c511-4961-834b-afd5f2fbb8e1, and specifically:
1) You can switch from local debugging to remote debugging and set the machine name as 'localhost'. This will do a remote deployment on your local machine (thus not using the project's directory). You don't need to install the Remote Debugger tools, nor start msvsmon for this to work on localhost.
In case this helps anyone else, I had to do the steps outlined here to add the network share location to Windows intranet zone. In particular, I was having trouble with Visual Studio hanging on load when opening a solution on a network share (i.e. using VMware Fusion and opening a solution from my Mac's hard drive). I also had problems with PostSharp running in this scenario.
If i understand you correctly, your Visual Studio project files are stored on the network drive and you are running them from there. This is what I do and don't have any problems. You will need to make sure that you have set the security policy. You can use Caspol to do this, or via the control panel-admin tools menu.
"How can I get this to work?"
You have a couple choices:
Choice A:
1. Move all files back to your local hard drive
2. Implement some type of backup software on your machine
3. Test said backup solution
4. keep on coding
Choice B:
1. Get a copy of one of the FREE source control products and implement it.
2. Make sure it's being backed up
3. Test it
Choice C:
Use one of the many ONLINE source control repositories available. Google, SourceForge, CodePlex, something.
Well, my question would be why you are asking this. Is it not working when you are storing it on a network drive? I haven't tried this myself, and one problem I could envision would be that .NET code running from a network drive (ie. from the bin\Debug directory, also located on the network drive) would be running in a sandbox mode, unless you mess around with CASPOL (or use 3.5 SP1 which I hear has removed that obstacle).
If you have specific problems, ask about them. Never ask "Why is doing X not working?".
You're not saying if you're just one person or multiple persons accessing the same remote drive, but I'm assuming you're just one for each network directory. Is this correct? If not, no, there is no band-aid. Get version control, move the files back to a local disk.

CopyFile/CopyFileEx not working in Windows Server 2008 R2 SP1 x64

I have installed the OS in VirtualBox 4.3.8
I have compiled the Code that calls the CopyFile/CopyFileEx function in VC6, and VS2012 (for v10 and v11), but it refuses to work.
I am running the app in console mode, as Administrator.
It gives error 2: The system cannot find the file specified.
However, this code works fine for both functions on XP, Server 2003, and Windows 7.
What is the problem? Is it permissions? How can I find out what the problem is?
This is ERROR_FILE_NOT_FOUND. It's hard to look beyond the obvious explanation that the file name that you are providing when calling CopyFile refers to a file that does not exist.
Altough you don't give much info about the code, I recommend to download and run Process Monitor in background (you can filter your process).
You will see more detailed info such us if the folder really exists, etc.

Windows Phone: Log to console

Disclaimer: I'm quite new to the MSFT tech world and only started Windows Phone development a month or so ago.
I am unable to figure out how to log information to the Visual Studio Output window from within a C# and C++ (Direct3D) Windows Phone 8 App. Is this possible?
I am building in debug mode, targeting Windows Phone 8, running in the XDE emulator and my development machine is a Windows 8 box with VS2012 Ultimate installed. My App runs fine, my Direct3D scene renders normally, but I can't log anything! This makes tracing code execution difficult and forces me to use breakpoints (which can be overkill in many situations).
I've been searching far and wide and have tried many methods (OutputDebugString being one of them). I can't see anything on MSDN about this - why is this not documented anywhere?
Yep, it's possible to write debug strings from WP8 C++ to the output window in VS2012. I actually have an example of that here.
1) Invoke OutputDebugString from C++.
void Direct3DInterop::MyButtonWasClicked()
{
OutputDebugString(L"Button was clicked!");
}
2) Before running the app make sure to change to the native debugger from the managed debugger in the project's properties.
I believe the methods in System.Diagnostics.Debug (specifically the overloads of WriteLine()) work...although I haven't tried them with C++ apps.

Stopping the explorer.exe taskbar from opening when using the windows file explorer on XP

I am creating a shell-replacement for developers, which creates a new windows user, titled "developer" and only when you log into this user, should the shell be launched.
The replacement start menu is replaced with a shell based terminal with great features, the taskbar is replaces with a tree based view for windows, and the process monitor is replaced with a view where you can attach process monitors, debuggers, profiles, and memory leak detectors, etc.
I would like my application replace the regular windows shell. I have however came across a registry key that, on windows 7, works just fine. but on windows XP if I use the regular windows XP file manager the windows XP task bar from explorer.exe launches, even though I changed said registry entry!
Does anybody have any idea what it is I need to do to fully replace the windows shell AND taskbar using windows XP while still retaining use of the windows based file manager?: )
Edit:
Using C++, developing using NetBeans using Qt for my gui library. however, as I do not think this should effect the answer, I figured I would include it either way.
I believe Windows XP does not support per-user shell replacement (not sure, it's been a while since I played with the desktop stuff), but you should be able to set the 'Shell' entry under HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon and prevent Explorer from registering itself as the shell when it first runs. This will affect all the users in the machine, of course.