Is it a need to upgrade VC 7.0 to VC 7.1? Thanks. Vicent

I was reading a ppt ( http://www.gotdotnet.com/team/pdc/4064/tls310.ppt )
and came aross this statement.
"Users can leverage a destructor. The C++ compiler generates all the Dispose
code automatically, including chaining calls to Dispose. (There is no

All,
I would like to write a DLL with a few function that are not available in
WMI.  I know how to write a dll but is there anything special that I must
add to it if I want to be able to you the function from with in it.

I encounter problems during execution of code like the followng that is part
of Dll of managed C++ classes.
When attempting to create the not managed objet (instance of CA) i always
get the exception:

I have a complex threading deadlock scenario that I've been able to
reproduce in the debugger. I hit break and look at the call stack which
should tell me what I need. Except I only get the very bottom of the
call stack:

In managed C++, there is variable String *s. The variable got value from a
C# assembly. Then I need to convert it into char *c in order to call
an external function in a dll that accepts parameter func(char c[]).
How to convert from String *s to char *c?

I've got a template function
move_by( rect<T>&, T x, T y) being called as
rect<float> r;
move_by( r, 3.0, 4.0 );

(Please excuse me for not really knowing where to post this.
I picked the biggest and best audience I know of.)
I am having trouble running my release build from VC7.
It doesn't. When started, it just shows a message box about failing to

I have an MFC application that uses FlashWindowEx to notify the user of an event by minimizing a window on the taskbar and calling FlashWindowEx.  This works fine except if you are using the Windows Classic theme on Windows XP.  If you switch back to one of the built-in XP themes ...

I'm working with images in Visual C++ and I need a fast method to access to individual pixels of an image. Actually I'm using the GetPixelAddress method of the Image class, but it's too slow.
Thanks for all.

I have some legacy code I would like to wrap by some new managed C++
classes, put them all into a DLL and then call the managed classes from a C#
app.
Can anyone recommend me a link with some info about this?

I copied this example off ECMA C++/CLI draft document, and it doesn't
compile:
#using <mscorlib.dll>
using namespace System;

error PRJ0019: A tool returned an error code from "Copying assemblies
to target directory..."
I got this when I added a reference to a project. The reference was to
a dll created in another project. Now if I copy the dll itself over to

Here's what I try :
LPCTSTR tst = (LPCTSTR) (LPCWSTR) Marshal::StringToHGlobalUni(str);
c:\MyNetPrj\Prj0001\stunt.cpp(244): error C2440: 'type cast' : cannot
convert from 'System::IntPtr' to 'LPCWSTR'

i just migrated from vc6 to vc7.
now, as i am using microsof visual studio .net, i try to compile my
projects that are using stl vectors, i get errors reporting about some
xtring?