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I am writing a managed wrapper for an unmanaged class. The unmanaged class is stored in a dll. At the top the of the .cpp file for the managed wrapper i have #using<unmanagedclass.dll> I've also added a reference to this dll using the Add References... option. However, when I compile, the compiler does not recognze my unmanaged class.
Thanks
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hi,
try this one before calling u r unmanaged methods
#pragma UNMANAGED
by
baijumax;P
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Hey all,
We have a C++ GUI application built with Trolltech's QT and building with Visual Studio as a Win32 application. If I were to want our application to make the switch to managed code would I be able to do this with the third party (QT) libraries? That is it possible to take existing .libs and 'manage' them in my code? Are there any other caveats?
Thanks,
Daniel
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Can someone out there give suggestions and solutions(console) to a part of my project .. i am pretty new to graphs and C++ .. here is the problem
=--------------------------------------------------------------=
I wanted to implement a graph class with the following functions
addNode - adds a node
addEdge - to connect 2 nodes
countNodes - to return the countof nodes
countEdges - to return count of edges
countPaths(i,j,k) - returns count of number of paths of length k from nodes i to j
displayEdges - display list of edges
can you include the time complexity of each function, and will be glad if you write extra functions to work with my graph exercise
thanking you in advance!!
Bula mai Fiji!
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I have to read a file that has 2 integers in each line. I'm using Visual c++ .net and I read the file like this:
String *l = s->ReadLine();
How can I split the String to have 2 different Strings, each one with one integer?? I know there is a function for String that is called Split but I don´t know how to use it.
Thanks for your help
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Hi,
U Can Use Split Function Like Below. Assume That your string contains 2 integers .seperated by "," or space or any other delimiter.
System::String* YourString = new String("1,2");
System::String* SplitString[]= __gc new String*[2];
SplitString[0]=",";
SplitString = YourString.Split(SplitString[0].ToCharArray(),2); here delimiter ","
by
baiju.km
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I noticed that CodeProject:MaChat - a chat with a browser for LANs, which incidentally is one of the many wealths on this site, can only be compiled in 2002.VS.net. 2003 throws a datatype error. What specifically is different between these IDE versions which would cause this type error.
Just curious 
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I have created a new c++ Class Library Project, I've compiled it and dll (x)has been created, now I have a c++.net console app and want to reference x dll. I add the reference and on object browser I can see assembly, namespaces and classes, but when writing using namespace x, I can not reference the classes in the namespace from dll.
I am seeing in the object browser that what is a class in my class library is a public sealed struct (System.ValueType) in the assembly when I reference it.
What am I doing wrong...
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InternetCrackUrl takes an URL_COMPONENTS structure as a parameter, and contained within that structure are various pointers to buffers and associated lengths. One of the options for retrieving information on an URL is to pass a length for a given string as 1, but have the pointer itself pointing to NULL. If one does this, InternetCrackUrl will allocate a buffer for the string in question. My question is, how does one free this memory?
Thanks in advance
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I'm using VC++ 2005 Express Edition. When I try to use wizard for adding a class or a function an error causes so I have to add my classes and functions manually.
Do u have the same problem or not?
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I use VS 2005 beta, and I have a similar problem.
No error occurs, but the wizard still won't work.
It just adds a new, empty file.
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I promised a company I would program a small application (using win32/mfc/vc++) that would put their logo in the top, right corner of every document printed (no matter from which application). I thought this would be an easy task  , but... 
I've spent hours on the net and can't find any information even touching the subject of editing already queued print jobs
Please help me... 
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I have this strange problem: i am importing ExitWindowsEx function from the user32.dll file to shut down and restart computer. When i start my application from Visual Studio it works just fine but when i start it directly nothing happens.  ( Note that Log Off feature works without any problems, and it uses the same function, only with a different parameter, of course. What is happening with my application ???
--Nikola--
modified 7-Dec-20 21:01pm.
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sorry, bit of a newbie
noticed this code on page: http://www.codeproject.com/shell/SHDireSizeColumn.asp
Display content size for a folder in Explorer using shell extensions
but how do i enable this for my XP PC?
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hi ,
i want the source code to the desktop sharing apllication in vc++.net
can anybody help me,
thanks,
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Hi,
Is it possible to conditionally change the value of the "Browsable"
attribute at the top of the property constructor at runtime in VC++.net?
For example, I would like to conditionally change the following property
(PartNumber) to display in a property grid. I can control whether it
displays by inserting either Browsable(True) or Browsable(False), but I
would like to do this programmatically based on a condition.
[Browsable(True)]
__property String* get_PartNumber()
{
return _partNumber;
}
__property void set_PartNumber(String* value)
{
_partNumber = value;
}
thanks,
Pradeep
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Is there a way to properly get the handle of an MDI child window thats been added. I am creating a new form then making it a child of my parent MDI form:
<br />
mFrmSubWindow->MdiParent = this;<br />
Then I'm trying to get the windows handle, I do this by calling a fuction which does:
<br />
(HWND)this->Handle.ToInt32()<br />
When I call this I get an exception with the error "Error creating window handle" perhaps I am going about this the wrong way or not doing it properly?
Thanks!
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Hello,
I have Windows Forms application (VS .NET 2003) where I need to draw several lines directly on some Form. How can I prevent those lines to be erased by overlapped window? What type of private member in this Form class do I need to use to store picture and use it inside “OnPaint(PaintEventArgs* e)” method to redraw this Form properly?
Thanks a lot for help, regards,
Leon
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Hello
I´m working with a Genetic Algorithm library (GALIB), written in C. I know for sure that it works perfectly in VC++6.
Still I've got a problem:
I've got an error from one of the constructors defined in the library, and my question is:
ISN'T IT POSSIBLE TO PARSE A PARAMETER OF A CONSTRUCTOR FROM A POINTER TO A VOID?
I wrote the following lines:
class GAParameter
{
public:
GAParameter(char *fn, int tp, void *v); // line 32
~GAParameter(void);
};
The error:
GAParameter.h(32): error C2629: 'GAParameter (' unexpected
GAParameter.h(32): error C2238: token unexpected before ';'
PS: when I don’t write “void *v” there is no error, but I need this pointer!, and I can't discover what causes the problem.
THANKS A LOT
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I have some experience programming in C# .NET but am new to C++. Could somebody please tell me what the difference between "->" and "." are in C++, which is to say:
when is it appropriate to use
someclass.whatever
and when is it correct to use
someclass->whatever.
Thanks!
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"ptrsomeclass->whatever" is shorthand for "(*ptrsomeclass).whatever"
you must have a pointer to someclass to use ->
you must have a direct instance of someclass to use .
for example:
someclass someobject;
someclass* ptrobject = &someobject; //&=addressof
someobject.whatever;
(*ptrobject).whatever; //* dereferences address
ptrobject->whatever; // same as line above
Sincerely,
-Ron
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I opened file with modes
CFile mode :: Create, Write, NoTruncate.
made SeekToEnd
But it overwrits file.
How to just add information to file ?
Thanks
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How to get "file size ON DISK" ?
but not logical size, as
DIR comand says,
but full size -with taken claster size?
Are there such API ?
thanks.
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HANDLE hFile = CreateFile(...);
DWORD dwSize = GetFileSize(hFile, NULL);
.
.
.
CloseHandle(hFile);
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