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Re: Dynamic array initialization. 73Zeppelin30-Jul-03 6:49 73Zeppelin 30-Jul-03 6:49  Ah, ok. One question. If I have a 4 element matrix, is the proper syntax: ZeroMemory(&m_dHessianMatrix, sizeof(double)); <pre><code> ZeroMemory(&m_dHessianMatrix, 4*sizeof(double)); ? (Thanks for the suggestion) Re: Dynamic array initialization. John M. Drescher30-Jul-03 6:54 John M. Drescher 30-Jul-03 6:54  ZeroMemory(&m_dHessianMatrix, 4*sizeof(double)); John MFC/ATL thread syncronization alma30-Jul-03 6:26 alma 30-Jul-03 6:26  What functions/classes should I use for thread syncronization inside a module that is used in both ATL and MFC projects? -Alma- Re: MFC/ATL thread syncronization John M. Drescher30-Jul-03 6:37 John M. Drescher 30-Jul-03 6:37  Use the win32 API. CreateEvent(), CreateMutex() ... John Re: MFC/ATL thread syncronization alma30-Jul-03 11:19 alma 30-Jul-03 11:19  Yeah, right! Thanks! -Alma- Abstract Class Mahesh Varma30-Jul-03 5:43 Mahesh Varma 30-Jul-03 5:43  Hi all, How can i create an abstract class without using virtual keyword in c++. Mahesh Re: Abstract Class #realJSOP30-Jul-03 5:47 #realJSOP 30-Jul-03 5:47  You can't. ------- signature starts "...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001 "You won't like me when I'm angry..." - Dr. Bruce Banner Please review the Legal Disclaimer in my bio. ------- signature ends Re: Abstract Class Jonathan de Halleux30-Jul-03 5:49 Jonathan de Halleux 30-Jul-03 5:49  ??? If you use inherance overloading without virtual you will run into trouble. If you want to avoid virtual methods, use template meta programming. Jonathan de Halleux. Re: Abstract Class ZoogieZork30-Jul-03 6:16 ZoogieZork 30-Jul-03 6:16  Is there a particular reason you don't want to use virtual? - Mike Re: Abstract Class John M. Drescher30-Jul-03 6:54 John M. Drescher 30-Jul-03 6:54  I was thinking the same. John Re: Abstract Class Mahesh Varma30-Jul-03 19:03 Mahesh Varma 30-Jul-03 19:03  Hi Mike, Thanks.. No particular reason mike. It was an interview question. I just want to confirm whether it is possible. Mahesh Re: Abstract Class Navin30-Jul-03 6:31 Navin 30-Jul-03 6:31  You can't - an abstract class is defined as having at least one method be virtual and not having an implementation. e.g., class VirtualClass { public: virtual void OverrideMe() = 0; }; A compiler won't let you instantiate such a class. If you can instantiate it, then it is not an abstract class. "When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute and it's longer than any hour. That's relativity." - Albert Einstein Re: Abstract Class melwyn30-Jul-03 21:51 melwyn 30-Jul-03 21:51  We can prevent the instantiation of the class by making it's constructors private, however the problem with this is that the class cannot be derived then. Re: Abstract Class ZoogieZork30-Jul-03 9:37 ZoogieZork 30-Jul-03 9:37  Just a thought... did you have the __declspec(novtable) extension in mind? If so, keep in mind that the novtable attribute does not semantically mark the class as abstract; rather, it just removes the vtable initialization code. It just happens that this is most useful for application to abstract classes. - Mike windows message maps Chris Eatough30-Jul-03 5:13 Chris Eatough 30-Jul-03 5:13  Hi, Im writing 2 programs in VC++6 that broadcast messages to each other. One is a full blown windows program, complete with message map and handles incoming messages perfectly. The second however is a small console program, consisting of int main() and 1 global function. All of the examples i have seen implement the message map in dialog classes. Is it possible to implement it globally like shown below? MESSAGE_MAP() .... void GotAMessageWooYay() { ... } int main() { ... } Re: windows message maps John M. Drescher30-Jul-03 5:26 John M. Drescher 30-Jul-03 5:26  How are you going to broadcast messages to the console application?? I think you need at least a hidden window there. Unless you send thread messages. John Re: windows message maps Beer2630-Jul-03 5:32 Beer26 30-Jul-03 5:32  I agree, messages are sent through the winproc, and if there is no window, there is no proc. IStorage Character Limit PenguinSource30-Jul-03 5:05 PenguinSource 30-Jul-03 5:05  Does anyone know how to get around the 31 character limit in IStorage::CreateStorage and IStorage::CreateStream? I am trying to use the IMAPI functions to programmatically burn data to a cd which I have been able to do successfully, however, I can't seem to get around the 31 character limit when trying to burn a file whose name exceeds 31 characters. Any suggestions? How to retreive the last data from a dialog box? Deepak Samuel30-Jul-03 4:55 Deepak Samuel 30-Jul-03 4:55  Hi, I have two dialog boxes, the first one is a normal one with the default buttons ok and cancel, while the second has a ok and a combobox. The program is supposed to work like this. When a person clicks ok in the first dialog box, the program takes the "DEFAULT" values and does some job . if cancel is clicked, the second dialog box is opened and some data is chosen from the combobox and takes this value and does the same job. when the job is done the application is closed, Now when I open the application once again, I want the last chosen value from the combobox to be set as the "DEFAULT" values . Is there a specific way to do this.. Can anyone suggest me ways as to how to proceed.. Thanks. Deepak Samuel Re: How to retreive the last data from a dialog box? John M. Drescher30-Jul-03 5:03 John M. Drescher 30-Jul-03 5:03  Get the selected item # of the combobox and save it in the registry using AfxGetApp()->WriteProfileInt(). Get it back using AfxGetApp()->GetProfileInt(). John Re: How to retreive the last data from a dialog box? RobJones30-Jul-03 5:03 RobJones 30-Jul-03 5:03  Look up history combo here at code project.. Should be in the combo & list box section.. It will do what you want.. Rob Whoever said nothing's impossible never tried slamming a revolving door! Re: How to retreive the last data from a dialog box? John M. Drescher30-Jul-03 5:27 John M. Drescher 30-Jul-03 5:27  Thanks for reminding me of that. I remember that is a good implementation so better not reinvent the wheel... John JOB_OBJECT_PROCESS_ID_LIST bigeyedfish8130-Jul-03 4:39 bigeyedfish81 30-Jul-03 4:39  Does anyone out there have experience with job objects??? The JOB_OBJECT_PROCESS_ID_LIST structure (which contains (namely) the PID's for all processes running in a job) will only give me the PID for the first process that I assign to the job. (i.e. if I assign Processes with PID's 1132, 1322, and 898, the only PID in the structures member "ProcessIdList" is 1132). If anyone has any insight on this poorly documented subject I would be eccstatic. TIA how do i check if a server is up on a specific port? k3n30-Jul-03 4:35 k3n 30-Jul-03 4:35  Hay im havin a problem trying to scan if my server is up using winsock because i cant scan the specific port is being used.... anyone know how i could do this? thanks size of an empty class melwyn30-Jul-03 4:34 melwyn 30-Jul-03 4:34  Why is the size of an object of an empty class 1?? class Empty { }; void main() { Empty ob; cout << sizeof(ob); //prints 1 } Any idea why it should print 1? It cannot be the address of something because one byte is not sufficient to store a valid address in WIN32.

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