template problems - C / C++ / MFC Discussion Boards

Blake Miller7-Oct-04 10:58

7-Oct-04 10:58

I ran into this with the Xupiter Spyware/Malware or whatever that CRAP was.
Only it had THREE programs doing this.
My trick was to stop one and have an explorer window OPEN to the folder where the EXE file was located. Once stopping it, I immediately deleted the EXE file.
Then I went onto the next one.
There were some DLLs loaded by IE and locked in memory that were a little tricker, and they resurrected one or two of the EXE files.
So.... I wrote a custom tool that has a file browser.
Any file I select gets added to the 'delete at restart' of Windows.
So, I added a bunch of the DLL files from Xupiter to this kill list, and the EXE files.
When I rebooted, it was mostly gone, then it was some manual cleanup of the registry.
Have not seen it since.

Re: Residental Application

David Crow7-Oct-04 11:12

David Crow

7-Oct-04 11:12

Blake Miller wrote:
I ran into this with the Xupiter...

I've battled this one several times.

Blake Miller wrote:
My trick was to stop one and have an explorer window OPEN to the folder where the EXE file was located. Once stopping it, I immediately deleted the EXE file.
Then I went onto the next one.

Good idea.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: Residental Application

Mike Beckerleg7-Oct-04 4:12

Mike Beckerleg

7-Oct-04 4:12

What do you mean by a Residential Application? If you clarify that it may be possible to give you a useful answer.

Mike

Re: Residental Application

Blake Miller7-Oct-04 10:59

Blake Miller

7-Oct-04 10:59

Windows NT Service should do the trick.

How do I keep Yahoo's IM toast from poping over my screensaver?

randythawkins7-Oct-04 2:27

randythawkins

7-Oct-04 2:27

I have written a MFC Screensaver and it runs just fine. There is one problem...when Yahoo Messenger displays a toast notification, the toast is displayed on top of my screensaver. This does not seem to happen with other, shipped-with-windows, screensavers. My screensaver window is already created with the WS_EX_TOPMOST flag. What more, if more, can I do to prevent this? Any tips, thoughts, pointers to another resource...???

I have already searched different groups and discussion boards but just can't find anything. If my answer is out there, I have failed in guessing the correct search keywords.

Thanks,
Randy

Need handle to CDocument.

Jack12467-Oct-04 2:12

Jack1246

7-Oct-04 2:12

Hi, i need to get a handle to the file i opened.

pPos = mainApp->GetFirstDocTemplatePosition();
docTempl = mainApp->GetNextDocTemplate( pPos );

// docTempl now has the correct pointer.

The CDocTemplates holds more CDocuments that are opened. I need a handle from doctempl that i retrieved, to i can close the document (if it was open).

Anyone experience with this? thx, Jack.

Re: Need handle to CDocument.

David Crow7-Oct-04 4:15

David Crow

7-Oct-04 4:15

A CDocument does not have a handle. If you want a handle to the file that the CDocument currently holds, use CreateFile(). Something like:

CString strFile = GetDocument()->GetPathName();
HANDLE hFile = CreateFile(strFile, GENERIC_READ, ...);

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

template problems

pankajdaga7-Oct-04 2:01

pankajdaga

7-Oct-04 2:01

Hi everyone,

I am having problems trying to use a templated function.

I have a templated function like so:

template <class T>
bool SetCellStyle(int row, int column, const T & value)

Now I call the function like this for example:

void MyFunc(int value)
{
objectPointer->SetCellStyle<int>(row, column, value);
}

This results in the following error:
error C2275: 'int' : illegal use of this type as an expression.

I do not know why I am not allowed to do this. I would really appreciate some help here.

Thanks,
Pankaj

<font size = "1">
/**
I'm the one who's gonna have to die
When it's time for me to die
So let me live my life
The way I want to
- Jimi Hendrix
*/</font>

Re: template problems

Joaquín M López Muñoz7-Oct-04 2:29

Joaquín M López Muñoz

7-Oct-04 2:29

Hello, first of all please turn the "Do not treat <'s as HTML tags" checkbox on when posting code, so that <s are shown properly. I reproduce here your code (with brackets):

template <class T>
bool SetCellStyle(int row, int column, const T & value)
 
void MyFunc(int value)
{
objectPointer->SetCellStyle<int>(row, column, value);
}

Is MyFunc by chance a member function of a class template? If so, maybe you're being hit by a nasty problem with so called dependent contexts. Please try the following and report the results:

void MyFunc(int value)
{
objectPointer-> template SetCellStyle<int>(row, column, value);
}

Did that work?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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Re: template problems

Joaquín M López Muñoz7-Oct-04 2:38

Joaquín M López Muñoz

7-Oct-04 2:38

Oh, also, you don't really need the <int> part here. The following should suffice:

void MyFunc(int value)
{
objectPointer->SetCellStyle(row, column, value);
}

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
Want a Boost forum in Code Project? Vote here[^]!

Re: template problems

pankajdaga7-Oct-04 10:44

pankajdaga

7-Oct-04 10:44

Hi!

Thanks. The whole problem was the <int> in the call. It behaves ok when I use

objectPointer->SetCellStyle(row, column, value) instead of
objectPointer->SetCellStyle<int>(row, column, value);

I have no idea why. I thought after VS 5.0 this problem disappeared. I am going to try it with VS 7 to see what happens.

Cheers,
Pankaj

<font size = "1">
/**
I'm the one who's gonna have to die
When it's time for me to die
So let me live my life
The way I want to
- Jimi Hendrix
*/</font>

Debugging DLL project in VC++ 6.0

Neeranjan7-Oct-04 1:51

Neeranjan

7-Oct-04 1:51

Hi,
I have two projects
1. DLL project: Creating one .dll file
2. Application project: Which uses the .dll file created in Dll project

First I execute the Dll Project in Debug mode wherein it creates a .dll file. Now I copy this .dll file to the Debug folder of Application project. Now I execute the Application project in debug mode which uses the created .dll file.
How can I debug the DLL project (traversing .cpp files of DLL project by puting break points) i.e. I put a break point into a CPP file(X) of DLL Project and one break point in the CPP file(Y) of Applicatin project where it calls the function from dll file. When control reaches the break point in Y which calls to the function in dll file and if I press F5, control should go to the function in CPP file (X) of DLL project.

How to do this?

Thanks & Regards,
Neeraj

Re: Debugging DLL project in VC++ 6.0

Roger Allen7-Oct-04 7:13

Roger Allen

7-Oct-04 7:13

Insert the DLL project into .exe workspace from the projects menu
Set the exe project as active configuration
Make the exe project dependent on the dll project (porject dependencies)
Add a post build step to the dll project which copies the nuilt dll to the applications directory
Place breakpoints as required (works as VC knows about both)
Debug as required.

If you vote me down, my score will only get lower

Writing/Reading binaric objects to/from a file

impeham7-Oct-04 1:46

impeham

7-Oct-04 1:46

I need to save few objects' to a file and reload them later on to memory.
I used something like that:

WriteFile(hFile, obj_ptr, sizeof(DATABASEINFO), &NumberOfBytesWritten, NULL);

and then:

ReadFile(hFile, CurrentObject, sizeof(DATABASEINFO), &NumberOfBytesRead, NULL);

where "CurrentObject" is a pointer to an allocated space for "DATABASEINFO" structure.

This method doesn't work. the Read operation reads nonsense.

Can anyone see the problem? is there a better way for doing this?

Thanks.

Re: Writing/Reading binaric objects to/from a file

Cedric Moonen7-Oct-04 2:19

Cedric Moonen

7-Oct-04 2:19

Make sure the structure members are on 1 byte boundaries. You can specify that using:

#pragma pack(1)
macro.

You can also specify it for complete project in project -> settings, C/C++ tab and there choose the Code generation category and set struct member alignment to 1 byte.

Re: Writing/Reading binaric objects to/from a file

impeham7-Oct-04 2:45

impeham

7-Oct-04 2:45

ok. it seems to do the work. but there is still a problem with pointers types. is there a simple way to handle them?

for example, in one structure i am holding a property from type char*. when writing the object to the file, the pointer is stored and not the string held in it, which is, of course - useless.

Re: Writing/Reading binaric objects to/from a file

Cedric Moonen7-Oct-04 3:03

Cedric Moonen

7-Oct-04 3:03

Of course, you cannot use this when your structure hold pointers !!! WTF | :WTF:

What is a pointer ? A pointer is just a 32 bits variable that holds an adress (at this adress, the data is stored). So, when you write the pointer to the file, it just stores the adress and not the data.

If you want to save your structure, it would be a better idea to encapsulate the save/load functions inside your structure (if you don't use the MFC and/or don't want to use serialisation, you can do it yourself):

typedef struct
{
   int DataCount;
   int* pSomeData;

   void SaveData(HANDLE* hFile)
   {
      DWORD NumberOfBytesWritten;
      WriteFile(hFile, &DataCount, sizeof(int), &NumberOfBytesWritten, NULL);
      WriteFile(hFile, pSomeData, sizeof(int)*DataCount, &NumberOfBytesWritten, NULL);
   }

   void LoadData(HANDLE* hFile)
   {
      DWORD NumberOfBytesRead;
      ReadFile(hFile, &DataCount, sizeof(int), &NumberOfBytesRead, NULL);
      pSomeData = new int[DataCount];
      ReadFile(hFile, pSomeData, sizeof(int))*DataCount, &NumberOfBytesRead, NULL);
   }
} YourStruct;

And from the outside it will look like:

YourStruct* pStruct = new YourStruct;
//Do something with pStruct
//..
//..
pStruct->SaveData(hFile);

Or for loading:

YourStruct* pStruct = new YourStruct;
pStruct->LoadData(hFile);
//Do something with pStruct
//..
//..

Hope this helps

Re: Writing/Reading binaric objects to/from a file

Ravi Bhavnani7-Oct-04 2:23

Ravi Bhavnani

7-Oct-04 2:23

See this[^] article.

/ravi

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Data Sharing

shiraztk7-Oct-04 0:49

shiraztk

7-Oct-04 0:49

Hi all

How can I share some memory allocated in one process by another process by using dll.?
Is there any way to accomlish this using other methods

Thanks in advance

The Best Relligion is Science.
Once you understand it, you will know God.

Re: Data Sharing

Cedric Moonen7-Oct-04 1:12

Cedric Moonen

7-Oct-04 1:12

Maybe you can use memory-mapped files ? You can open a file-mapping object in memory from one process and access data in it within another process.
Take a look at the MSDN for file mapping (and file mapping functions...)

Hope this helps

Re: Data Sharing

Blake Miller7-Oct-04 11:07

Blake Miller

7-Oct-04 11:07

Or...even look more locally...

http://www.codeproject.com/threads/ipc_tute.asp

http://www.codeproject.com/win32/cmemmap.asp

http://www.codeproject.com/threads/csharedstruct.asp

http://www.codeproject.com/threads/sm.asp

http://www.codeproject.com/threads/sharedmemipc.asp

http://www.codeproject.com/threads/memmapipc1.asp

http://www.codeproject.com/threads/SharedMemory_IPC_Threads.asp

That should get you pointed in the right direction Cool | :cool:

Re: Data Sharing

jan larsen7-Oct-04 1:22

jan larsen

7-Oct-04 1:22

The recommended way to share data, is memory mapped files. Look up the functions CreateFileMapping and MapViewOfFile.

You could also create a shared section in your dll, I can't remember the procedure, but you should be able to find it on MSDN by searching for '#pragma' and 'shared'.

I don't think you can share memory allocated by new() or malloc() though...

"After all it's just text at the end of the day. - Colin Davies

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Re: Data Sharing

shiraztk7-Oct-04 19:40

shiraztk

7-Oct-04 19:40

Hi
Thank you all, it was of great help.
See you all later Smile | :)

bye

The Best Relligion is Science.
Once you understand it, you will know God.

Converting CString

Franz Klein7-Oct-04 0:07

Franz Klein

7-Oct-04 0:07

I am using Visual Studio .NET 2003.
I would like to convert a CString into a std::string. With Visual C++ Ver 6.0 one could just use the std::string constructor, but now I get an error message with VS .NET 2003. Does anybody know?
Cry | :((

I am the handsome one in the crowd.

Re: Converting CString

Joaquín M López Muñoz7-Oct-04 2:40

Joaquín M López Muñoz

7-Oct-04 2:40

Maybe forcing the conversion to a LPCSTR?

Cstring cs=...;
std::string s=(LPCSTR)cs;

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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