Comments by manoranjan (Top 22 by date)

Thank you!

You are welcome!

This is done on the router/firewall that is protecting the VPS. Ask the guy who configured VPS's private IP. He will need to know your client's and server's listening ports.

I would be very careful of modifying medical images. Usually, one uses Histogram equalization to improve dynamic range of a low contrast image. However, understand its pros and cons before you implement it!

You dont need to use Leadtools library for this task. You can call .NET API directly in your MFC app using either C++/CLI or managed C++ extensions. If your target is Win 7 (should be since > 8bit is not supported in XP), then .NET is available and you dont have to redistribute it.

Another option could be to use OpenGL (it supports 16 bit bit depths). It will be more portable than .NET. However, OpenGL would involve more work.

You are welcome :)

Can you please be more specific? IUnknown->Release() returns a reference count and not HRESULT.

In any case you shouldn't bother releasing a crashed COM server. AddRef/Release mechanism is used to unload a COM server from memory. A crashed server is already unloaded (by the OS).

Since you have not shared the code, I cannot say what the problem could be. Perhaps, you have used Form1 without namespace (e.g. System::Windows::Form). You can avoid this error by specifying the namepace scope 'using namespace System::Windows::Form;'
Since you are new, please take some time and understand C++/CLI before creating this project. Regarding your previous question, there is a nice article in CP that discusses instantiating CLI classes: http://www.codeproject.com/Articles/17787/C-CLI-in-Action-Instantiating-CLI-classes

I strongly suggest that you go through this (as well as other introductory articles) and samples before creating your project. Good Luck!

Check if your Form1 class defines an empty constructor. Secondly, do not use parenthesis. See MSDN for details. It also provides a sample: http://msdn.microsoft.com/en-us/library/system.windows.forms.form.form.aspx#Y124

Please read the KB article carefully. You cannot call any arbitrary function using rundll32. Also, it does not make sense to call all functions at command-line. E.g. why would anyone want to call malloc() at DOS prompt? In your case, although, the constructor does not return a value (or take inputs), it needs to be invoked on an allocated memory. Therefore, even if the class was exported, you cannot use rundll32. Finally, you need to use decorated names.

You cannot use rundll32 to call any type of functions. Usually, you use rundll to call functions that don't take arguments. However, see http://support.microsoft.com/kb/164787 for details. You can only pass strings to the function and not integers. In addition, either you need to create a .def file (for creating the dll) or, pass the decorated name to rundll32.

Create a C++ project that supports CLR (e.g. Windows Forms Application project). You will then be able to add references through the project's 'properties' dialog.

You need to have 'something' on Linux to receive files. It can be FTP, FTPS, HTTP(S), SSH, RSH server or even your own custom 'receiver' application. You need to decide the appropriate mechanism before creating your program.

File upload thru FTP, SSH (i.e. SFTP or scp), RSH (i.e. rcp) are usually done through a batch file. You will need an appropriate client program. However, you can also find appropriate client libraries (mostly, FTP clients) that you can use in your Java or C# app.

On the other hand, HTTP is well supported in both .NET and Java SDK. Additionally, if you need secure communication, you can easily upgrade to HTTP over SSL (HTTPS).

Of course, if you feel that the overhead of installing (and securing) a http server is too much (and your application is small). Then you can write your own server that will receive files. However, from my experience, small applications turn big quite quickly :). You might be better off using existing infrastructure.

I don't recommend RSH or FTP since password is not encrypted during transmission.

HTH. Good luck!

Have you set REMOTE to correct IP (or hostname) and not '000.000.0.000'?

Usually, 'connection refused' error occurs if the server is not running. It can also occur if a firewall is blocking the connection. (but this is rare since f/w is usually configured to drop a packet). Check also whether TCP filter on network adaptor is enabled.

You are welcome:) Glad to be of help.

sorry, didn't understand your question fully. If you want to manually unload the dll, then you use /delay:unload and use __FUnloadDelayLoadedDLL2() to unload the dll. Otherwise, the dll will be unloaded when the application closes.