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namespace across multiple include files in library Joel Becker4-Jul-06 7:53 Joel Becker 4-Jul-06 7:53  Hey, I've created a static library (in VC6) and want it all under a namespace. The library builds successfully, but when I link an app. with it, I get link errors like: error LNK2001: unresolved external symbol "class LibNamespace::CGraphicsSystem LibNamespace::globalGSys" (?globalGSys@LibNamespace@@3VCGraphicsSystem@1@A) How does one do namespaces in a library with .h and .cpp files?? in my graphicsSystem.hpp I have namespace LibNamespace{ ... } and in the implementation file I have using namespace LibNamespace; globalGSys is declared in graphicsSystem.hpp under the LibNamespace namespace: extern CGraphicsSystem globalGSys; I've also tried: extern LibNamespace::CGraphicsSystem globalGSys; Still linker errors. Please help me. Joel Becker Re: namespace across multiple include files in library Jun Du4-Jul-06 9:44 Jun Du 4-Jul-06 9:44  I couldn't see anything wrong with namespace stuff. Have you exported your class? Best, Jun Re: namespace across multiple include files in library Joel Becker4-Jul-06 10:16 Joel Becker 4-Jul-06 10:16  Hey, Jun, thanks for your reply. I didn't see it until after I submitted my reply to myself (I don't USUALLY talk to myself). Everythings working now with linking with the app. Later, Joel Re: namespace across multiple include files in library Jun Du4-Jul-06 14:48 Jun Du 4-Jul-06 14:48  I didn't actually help, but you're welcome Best, Jun Re: namespace across multiple include files in library Joel Becker4-Jul-06 10:13 Joel Becker 4-Jul-06 10:13  Myself, Nevermind. I figured it out finally. It was a problem of namespace-wide variables: In the header file i had: namespace LibNamespace{ ... extern CGraphicsSystem GSys; ... } In the implementation: CGraphicsSystem GSys; I NEEDED TO WRAP THE IMPLEMENTATION'S DEFINITION IN THE NAMESPACE: namespace LibNamespace{ ... extern CGraphicsSystem GSys; ... } using LibNamespace; CGraphicsSystem::CGraphicsSystem() {...} ... (Is this educational to anyone else, or am I just namespace-naive?) Myself .hh extension header files [modified] Jay034-Jul-06 7:09 Jay03 4-Jul-06 7:09  I am working on a project which has .hh file extension #include <RTI.hh> What is the difference between .h files and .hh files I also noticed how it is not from the same directory as the project files rather from the standard library because it is #include <....> rather than #include "...." Does anyone know what is going on? If anyone has worked with such files please help me out here. Thanks, Jay -- modified at 13:16 Tuesday 4th July, 2006 Re: .hh extension header files toxcct4-Jul-06 7:31 toxcct 4-Jul-06 7:31  basically, .h and .hh are the same things : C/C++ header files. the fact that the file is included with <> indicated to the compiler to search the file in its (the compiler's) includes folder instead of looking in the project directory (this is the purpose of including with ""). TOXCCT >>> GEII power [VisualCalc 3.0  updated ][Flags Beginner's Guide  new! ] Re: .hh extension header files [modified] Jay034-Jul-06 7:42 Jay03 4-Jul-06 7:42  Thats exactly what I thought but why do we have two different extensions in the Standard library #include <abc.h> and #include <def.hh> Is there any specific reason why we name it that way?????? Thanks, Aravinth -- modified at 13:43 Tuesday 4th July, 2006 Re: .hh extension header files toxcct4-Jul-06 7:43 toxcct 4-Jul-06 7:43  i don't really know... maybe to explicitely differ between C and C++ headers... it's quite similar to .hpp files. TOXCCT >>> GEII power [VisualCalc 3.0  updated ][Flags Beginner's Guide  new! ] Re: .hh extension header files Jay034-Jul-06 8:04 Jay03 4-Jul-06 8:04  Im pretty sure Zac Howland knows. He works with RTI (Run time Infrastructure) thanks for your help TOXCCT Cheers, Jay Re: .hh extension header files toxcct4-Jul-06 8:07 toxcct 4-Jul-06 8:07  Jay03 wrote: Im pretty sure Zac Howland knows maybe,but this is not specific to RTI AFAIK... Jay03 wrote: thanks for your help TOXCCT welcome. TOXCCT >>> GEII power [VisualCalc 3.0  updated ][Flags Beginner's Guide  new! ] Re: .hh extension header files Jun Du4-Jul-06 9:11 Jun Du 4-Jul-06 9:11  Sometimes, a header is named .hh or .hpp to emphasize it's a C++ (not C) header. Best, Jun Re: .hh extension header files Jay034-Jul-06 9:39 Jay03 4-Jul-06 9:39  But can you call upon a C header when you are working with a C++ Project??? Thanks, Jay Re: .hh extension header files Jun Du4-Jul-06 9:46 Jun Du 4-Jul-06 9:46  Sure. Compilers don't distinguish C from C++ any more. Best, Jun Re: .hh extension header files Jay034-Jul-06 9:57 Jay03 4-Jul-06 9:57  Does this mean that .h files are definately a C HEADER ? Re: .hh extension header files Joe Woodbury4-Jul-06 11:16 Joe Woodbury 4-Jul-06 11:16  No. The standard does not dictate an extension; the use of .h is by convention. The best you can say is that a file with a .h extension is probably a C or C++ header file. Anyone who thinks he has a better idea of what's good for people than people do is a swine. - P.J. O'Rourke Re: .hh extension header files Jörgen Sigvardsson4-Jul-06 12:04 Jörgen Sigvardsson 4-Jul-06 12:04  Some people (mostly unix folks), like to name their C++ files with a .cc prefix. Similarly, they use .hh prefix for C++ header files. There are also those to use .C and .H for C++ files, as the unix file system is case sensitive. I bet someone in your project is or was a unix programmer. -- A Stern Warning of Things to Come i need project used thes ocx name data repeater go2go14-Jul-06 6:50 go2go1 4-Jul-06 6:50  i need any cood use thes data repeater pleas send to my email ahm_goma2002@yahoo.com Re: i need project used thes ocx name data repeater toxcct4-Jul-06 6:53 toxcct 4-Jul-06 6:53  go2go1 wrote: need any cood use ... i need, i need i need !!! go2go1 wrote: need any cood use thes data repeater pleas send to my email where's the punctuation man ? go2go1 wrote: ahm_goma2002@yahoo.com noway forums are to share. go die with your email TOXCCT >>> GEII power [VisualCalc 3.0  updated ][Flags Beginner's Guide  new! ] dialogbox with textbox Desmo164-Jul-06 6:33 Desmo16 4-Jul-06 6:33  Hi, I have a dialogbox containing a textbox. In order to set the content of the textbox i do. dialogbox temp; (dialog is the name of the class i added) temp.textbox.SetWindowText("text"); (textbox is the name of the textbox) temp.DoModal(); i have problems with the line temp.textbox.SetWindowText("text"); even if when i use that line for textbox in the parent form there's no problem. Where i go wrong ? Another thing, if i wanna raise a non-modal dialogbox what should i write instead of temp.DoModal() ? Thanx, Desmo16. Re: dialogbox with textbox Justin Tay4-Jul-06 6:46 Justin Tay 4-Jul-06 6:46  You can't call SetWindowText() on a window that hasn't been created yet. Set the text in OnInitDialog() in your dialog. If you want a modeless dialog use Create() instead of DoModal(). Re: dialogbox with textbox Desmo164-Jul-06 6:58 Desmo16 4-Jul-06 6:58  I haven't an OnInitDialog as i have in the parent window. Maybe i go wrong in adding the dialog box. I add a resource whose kind is IDD_DIALOGBAR, then i add a class called xxx of kind IDD_DIALOGBAR having CDialog as baseclass, but there's no OnInitDialog method. Is that the correct way ? Generally which is the procedure to create another form ? Thank you so much, David. Re: dialogbox with textbox Justin Tay4-Jul-06 7:32 Justin Tay 4-Jul-06 7:32  You are supposed to override OnInitDialog() yourself if you need to. Go to the Class View and select your new dialog. Right click and select properties. In VC7.1, along the bar there is a button labelled Overrides. Find OnInitDialog, click on the drop list and add the function. Re: dialogbox with textbox Desmo164-Jul-06 22:25 Desmo16 4-Jul-06 22:25  It worked great ! Thanx ! Re: dialogbox with textbox Desmo164-Jul-06 22:35 Desmo16 4-Jul-06 22:35  Another little question: the string i use to write in the textbox show all in 1 line and there is a strange simbol where it should go to a new line. In the strings i tryed to use "\n" and also "\n\r" to obtain a newline, and in the MessageBox it works. Any suggestion ?

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