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Hi,
I have never had any problems from Win95 -> Win2k, only the other way around...
There was some issues with Win95 -> NT, but it seems pretty much solved with Win2k...
- Anders
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That really depends. Obviously you can't make Win2k specific API calls and still test your app on your Win95 machine. If you're going to stick with API calls that are the same (or close enough) between the two, you shouldn't have many problems.
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I disagree with the previous posts - You definitely need to test on 2K if the app's going to be used on 2K!
The major problematic area when going from 9x to NT/2K is in security. There isn't any security on 9x, so your programmers may be sloppy and not pay attention to security parameters to API calls. The code works fine on 9x, but chokes with access denied errors on NT/2K.
For example, when the code opens a registry key, it might request KEY_ALL_ACCESS access. That's fine on 9x, but will not work on NT/2K unless the user has admin rights. In general, requesting ALL_ACCESS to anything is Bad because it will break for non-admin users.
--Mike--
http://home.inreach.com/mdunn/
"That probably would've sounded more commanding if I wasn't wearing my yummy sushi pajamas."
-- Buffy
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Agreed,
Other problems are things such as resource usage which is limited on Win9x (to 2MB), but effectively unlimited on Win2K.
Different threading behaviour due to no Win16 Mutex, a lot of low level stuff is different as well, although that may not bother you. Depends what you are writing.
Also developing on Win2000 would be more robust - no system crashes due to a bad pointer etc.
Definitely test on 2000.
Stephen Kellett
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Would someone have a simple example of a smart pointer..I want to allocate memory for structures & classes...
I have seen the examples here, but they are over my head, I'm new to VC++.
If there's one example without worrying about synchronization & Threads, I would be happy.
Thanks,
Gerry.
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#include <memory>
std::auto_ptr<cmyobject> p = new CMyObject;
When p goes out of scope, it's automatically destroyed.
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Will this work for C-style Structures.
I want to create an array of structures on the heap & deallocate when the function goes out of scope.
Or do I need to put the structure inside a class?
I have about 5 variables that need allocated on the heap, 4 are BSTRs & one is an array of structures.
Gerry.
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auto_ptr doesn't work for arrays because it only calls delete rather than delete []. If you need arrays, why not use std::vector instead? For the BSTR's use bstr_t
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I'm working on my own tooltip class and I need to find the width and height of the mouse cursor.
I've tried GetSystemMetrics with SM_CXCURSOR/SM_CYCURSOR but that only returns what looks to me to be the maximum dimentions of the mouse cursor, not the current mouse cursor width and height.
Any suggestions?
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try
BOOL GetCursorInfo(CURSORINFO *ci);
and/or
GetClipCursor() which will give you a rectangle of its boundary
Stephen Kellett
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Hi,
I want to use programatically the win NT command "Net send".
For example to send a message to computer named "Compsrv" i write this like :
c:\> Net send Compsrv Good morning my dear
I use following code to execute this commande under windows with visual C++ :
ShellExecute(NULL, "open", "c:\\WINNT\\System32\\Net send Compsrv Good morning my dear", NULL, NULL, SW_SHOWNORMAL);
BUT it don't work
Can anybody help me
Regards
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I've been working on an app for the last week or two, and everything was going fine until yesterday.
I have an Access database with a handful of tables. I use the following code to (successfully) open the database:
CString sDbName = "igps3.mdb"
CDaoDatabase* m_pDB = new CDaoDatabase();
m_pDB->Open(sDbName);
Next, I open recordsets (created with ClassWizard) for some of the tables. One of the tables is now inexplicably failing in the Open() function, but I don't know why. It honestly just started happening all of a sudden. Here's the code I use in my app:
int nOpenType = AFX_DAO_USE_DEFAULT_TYPE;
CRSDrivers* m_pRSDrivers = new CRSDrivers(m_pDB);
m_pRSDrivers->Open(nOpenType, "SELECT * FROM drivers");
The table exists in the database, and it appears to be okay. I've tried recreating the table from scratch, as well as creating a completely new table. It doesn't metter whether I try to open the recordset first, last, or somewhere in between. All of the other recordsets open without complaint.
Nothing seems to matter. All of the other recordsets open without any problem.
The program stops with a C++ exception in DaoCore.cpp after an attempt is made to open the daotabledef.
This is my first database app and I'm kind of at a loss.
Any suggestions would be appreciated.
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I wanna use the CString class in a non-MFC application, how can i do this? if this cannot be done, what can i use as a substitute? Thanks
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I have a LPDIRECTDRAW that is being created fine under debug mode but not under release mode. I am linking ddraw.lib in release and debug modes. When the program runs in release mode, it asserts on my create function:
ASSERT(DirectDrawCreate(NULL,&mDD,NULL) == DD_OK);
Thanks in advance for any suggestions.
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Here is the deal:
I have declared a class object in a function. Then I created a pointer to it right afterwords in the same function. Here is where the problem is. I try to pass that pointer to another function, and i get no errors, yet when i try to look at a data member of the class, i get all kinds of errors. Could someone tell me if this syntax for passing class pointers is correct?
(The class name is army and the object is MyArmy and the pointer to MyArmy is pMyArmy)
Pointer is declared like this:
void make_faction()
{
//creates object
army MyArmy(75, 5, 3000, 5);
//Creates a pointer to army
army* pMyArmy = 0;
//Gives the address
pMyArmy = &MyArmy;
//calling function
game_menu(pMyArmy);
}
Recieving function:
int game_menu(class army *pMyArmy)
{
return 0;
}
Is this the correct syntax? It shows no errors this way, but when i add
cout << pMyArmy->troops << endl;
to game_menu function, get errors.
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I'm not sure about 'class army *pArmy' but normally you pass a pointer to the class by just 'army *pArmy'.
Are you sure the problem is with the pased pointer, and not with the data type you are passing to cout?
What is the type of the troops member? what compile time errors do you get?
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One possible cause is the keyword class in the function declaration for game_menu. I also don't understand why you are creating a pointer?
Why not do it as followed?
void make_faction()
{
//creates object
army MyArmy(75, 5, 3000, 5);
//calling function
game_menu(&MyArmy);
}
int game_menu(army *pMyArmy)
{
return 0;
}
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I want to capture the any portion of a CFormView (displayed or not).
It is possible to get the viewable area with DC tricks but how about non-displayed parts? Where it is stored?
Suha
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http://www.fengyuan.com/article/wmprint.html
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Is this possible. I want to be able to call functions in a DLL writen in C++, from a program writen in C.
If it is possible, is it possible to call functions within a class?
THanks for any help,
Yours
David Wulff
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What font is used by office 2000 and 97 to paint the gui
Joel
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Verdana is used in 200 (I don't have access to 97, so I don't know about that). Arial is used for any verticle fonts though (e.g a verticaly docked menu bar).
Size? 8 I would guess, but maybe 7.
David Wulff
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And I thought they use Tahoma.
Uwe Keim
http://www.zeta-software.de
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It might be... I said Verdana because i took a screenshot via PSP and zoomed in, then tried to match the text. Verdana exactly covered the text so I presumed it was Verdana.
David Wulff
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