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Re: Exceptions Kevin McFarlane8-Apr-05 8:00 Kevin McFarlane 8-Apr-05 8:00  Tim Smith wrote: Just because it is modern doesn't mean it is good. That's true. But in general modern C++ is superior to older C++. I'd still go for exceptions over error codes. However, some languages, e.g., Eiffel, have a different and arguably a superior take on exceptions than say C# and Java. Kevin How to write a COM object with VC6, which can be refered in C# .NET prj? wangdave7-Apr-05 19:38 wangdave 7-Apr-05 19:38  Hi, As we know, we can write a COM object with VB6, which can be refered in C# .NET project. My question is, can I do so with VC6, other than VB6? In VB6, it is easy to create a COM object: Wizard->ActiveX DLL. But how to do this in VC6? I created a DLL in VC6: MFC AppWizard -> Regular DLL with MFC static..(with Automation checked). I refered it in my C# .NET prj, BUT any classes of it can NOT be seen. Why? Thank you in advance. Dave Re: How to write a COM object with VC6, which can be refered in C# .NET prj? ThatsAlok7-Apr-05 20:02 ThatsAlok 7-Apr-05 20:02  VC++->ATL COM AppWizard->Dyanamic Link Library [Vote One Here, Complete my Survey....] Alok Gupta visit me at http://www.thisisalok.tk          "I Think Believe this Will Help" Re: How to write a COM object with VC6, which can be refered in C# .NET prj? Anonymous20-Apr-05 15:33 Anonymous 20-Apr-05 15:33  Thanks. It is a good idea. manifest for win 2000 V.G7-Apr-05 19:26 V.G 7-Apr-05 19:26  Is is possible to give an XP look to programs written for win 2000 through manifesting? Re: manifest for win 2000 ThatsAlok7-Apr-05 19:57 ThatsAlok 7-Apr-05 19:57  V.G wrote: Is is possible to give an XP look to programs written for win 2000 through manifesting? Not possible,it's for Window Xp only! [Vote One Here, Complete my Survey....] Alok Gupta visit me at http://www.thisisalok.tk          "I Think Believe this Will Help" Re: manifest for win 2000 Michael Dunn7-Apr-05 20:20 Michael Dunn 7-Apr-05 20:20  No, because themes do not exist on pre-XP OSes. --Mike-- Visual C++ MVP LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ Strange things are afoot at the U+004B U+20DD Splitter Window Problem wasife7-Apr-05 18:26 wasife 7-Apr-05 18:26  Salam... I am making a splitter in my drawing SDI. I want that anything that i draw in one pane should also be drawn in other pane. I am using the same view class. But it does not draw in the other pane. If any one could help me in this regard. I am pasting the code in OnClientCreate(...) function. BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext) { CRect rect; GetClientRect(&rect); m_splitter.CreateStatic(this,1,2); m_splitter.CreateView(0,0,RUNTIME_CLASS (CMyPaintBrushView),CSize(rect.Width()/2,rect.Height ()),pContext); m_splitter.CreateView(0,1,RUNTIME_CLASS (CMyPaintBrushView),CSize(rect.Width()/2,rect.Height()),pContext); return TRUE; } Foreign language Support AlexEvans7-Apr-05 18:10 AlexEvans 7-Apr-05 18:10  Hello all I am working on internationalization of an application and tried using some of the functions that I could see as relevant in this context: 1)IsValidLocale() returns always true, with my 2nd argument being LCID_INSTALLED 2)Tried also using the pair EnumUILanguages() and the associated callback required, BUT could not find anywhere an example of what this call back should have inside it…. Any help will be appreciated Thanks Alex Re: Foreign language Support Michael Dunn7-Apr-05 20:22 Michael Dunn 7-Apr-05 20:22  I can point you at Michael Kaplan's blog[^]. He does i18n work and has discussed many of the relevant APIs (both Win32 and .net). --Mike-- Visual C++ MVP LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ Strange things are afoot at the U+004B U+20DD Re: Foreign language Support AlexEvans7-Apr-05 22:40 AlexEvans 7-Apr-05 22:40  Hi Michael Thanks for that, but after following the link, could not search or ask any question becasue I am not a registerd member Thanks again Alex Re: Foreign language Support ThatsAlok7-Apr-05 23:27 ThatsAlok 7-Apr-05 23:27  Alex Evans wrote: I am not a registerd member Then Register, Its free here at CP [Vote One Here, Complete my Survey....] Alok Gupta visit me at http://www.thisisalok.tk          "I Think Believe this Will Help" Re: Foreign language Support AlexEvans8-Apr-05 0:04 AlexEvans 8-Apr-05 0:04  Hi Alok I am a registered user at CP, but I am not on that site that Michael pointed me to... I visited your web site but could not find and answer to my question Maybe you can be a bit more specific Thanks Alex Re: Foreign language Support Michael Dunn8-Apr-05 6:16 Michael Dunn 8-Apr-05 6:16  You can go to blogs.msdn.com[^] and make an account from that page. --Mike-- Visual C++ MVP LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ Strange things are afoot at the U+004B U+20DD binding a socket to a particular interface? Gary Chapman7-Apr-05 17:53 Gary Chapman 7-Apr-05 17:53  Hi all! I have two network connections, both of which have the same destination address - the only thing that distinguishes them is the interface. I also have two processes: process 1 may only use connection 1, and process 2 may only use connection 2. Is there any way I can ensure that my outbound socket connects via a particular interface? I can't leave it to windows to decide which way to route the connections. Any help would be greatly appreciated! Thanks, Gary problem about variable scope HeartFriend7-Apr-05 17:27 HeartFriend 7-Apr-05 17:27  int nVar = 0; //GlobalVar int main(int argc, char* argv[]) { int nTest1 = nVar; int nVar = 1; //1stLevelLocalVar nTest1 = nVar; { int nTest2 = ::nVar; // can acess global var, but how to access 1stLevelLocalVar int nVar = 2; //n2ndLevelVar nTest2 = nVar; } return 0; } Re: problem about variable scope Christian Graus7-Apr-05 17:35 Christian Graus 7-Apr-05 17:35  Here's your chance to learn that global variables are crap. Christian I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer Re: problem about variable scope Ryan Binns7-Apr-05 18:11 Ryan Binns 7-Apr-05 18:11  Don't do it. Never, ever reuse variable names like that. It just leads to all sorts of problems with accidentally using the wrong one. Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact" Re: problem about variable scope HeartFriend7-Apr-05 19:06 HeartFriend 7-Apr-05 19:06  i just do it for test purpose Re: problem about variable scope cmk7-Apr-05 19:45 cmk 7-Apr-05 19:45  Without the global :: specifier i believe the name alone will get the variable at the next outer level of scope. e.g. int main(int argc, char* argv[]) { int t0, t1, t2; int v = 0; t0 = v; { t1 = v+1; // = 0 + 1 = 1 int v = t1; { t2 = v+1; // = 1 + 1 = 2 int v = t2; } } return 0; } ...cmk Save the whales - collect the whole set Re: problem about variable scope Michael Dunn7-Apr-05 20:28 Michael Dunn 7-Apr-05 20:28  There is no syntax to say "one scope outward". You can only access the global scope with a plain :: (And obviously, don't write real code like this, your teammates will thank you) --Mike-- Visual C++ MVP LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ Strange things are afoot at the U+004B U+20DD Re: problem about variable scope S. Senthil Kumar7-Apr-05 21:58 S. Senthil Kumar 7-Apr-05 21:58  Like everyone said, it's a bad idea to do this, in fact, the C# compiler doesn't compile code like yours.. But the answer to your questions is to just use nVar. That'll refer to the variable in the current (or enclosing) scope. Regards Senthil _____________________________ My Blog | My Articles | WinMacro how to check if a reference is NULL ng kok chuan7-Apr-05 17:07 ng kok chuan 7-Apr-05 17:07  hi, i have a class that is defined below: class DVertex { public: DVertex(MazeNode*) { this->node = n; this->parent = NULL; this->cumulativeCost = DBL_MAX; } // member functions void update(MazeNode*, double); // update the parent and cost. double getCCost() const { return cumulativeCost; } // required to relax the node. MazeNode& getNode() const { return *node; } // required to identify the node. MazeNode& getParent() const { return *parent; } // required for reverse lookup. private: MazeNode *node; MazeNode *parent; double cumulativeCost; }; now the problem is when i tried to check the value of parent, i.e. void main() { DVertex v; if (v.getParent()==NULL) ; // do something } this will not work.. however if i change the class to return me MazeNode*, i.e. MazeNode* getParent() const { return parent; } then i can do that the check. anyone know how to check if a reference is null? and by the way, can tell me how to change the inline constructor to something shorter? i remember seeing something like Constructor(<type> par1):var1=par1; but can't remember the exact syntax. thanks!! Re: how to check if a reference is NULL Ryan Binns7-Apr-05 18:14 Ryan Binns 7-Apr-05 18:14  A reference by definition can never be null. If your method could return NULL, then you'll need to return a pointer, not a reference. ng kok chuan wrote: can tell me how to change the inline constructor to something shorter? What's wrong with what's there? Is concise, easy to understand, easy to maintain... Why make it harder? Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact" Re: how to check if a reference is NULL ng kok chuan7-Apr-05 20:50 ng kok chuan 7-Apr-05 20:50  Ryan Binns wrote: What's wrong with what's there? Is concise, easy to understand, easy to maintain... Why make it harder? it's just for knowledge's sake... and thanks for clarifying the reference. so i'm not wrong when i changed everything to return pointers. now my code looks incomprehensible.. with both pointers and references... and i'm not going to go and standardize my code :p it's going to be fine as it stands.

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