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Syntactical blunder. esepich28-Sep-03 2:32 esepich 28-Sep-03 2:32  I know that it's there, I just can't figure out why this error is occuring. Compiling resources... Compiling... StdAfx.cpp Compiling... SSPing.cpp SSPingDlg.cpp C:\DOCUMENTS AND SETTINGS\ADMIN\DESKTOP\SSPROJECT\SSPing\SSPingDlg.cpp(204) : error C2664: 'sendto' : cannot convert parameter 2 from 'struct tagECHOREQUEST' to 'const char *' No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called Generating Code... Error executing cl.exe. SSPing.exe - 1 error(s), 0 warning(s) int CSSPingDlg::SendEchoRequest(SOCKET s, SOCKADDR_IN lpstToAddr) { static ECHOREQUEST echoReq; static nId = 1; static nSeq = 1; int nRet; echoReq.icmpHdr.icmp_type = ICMP_ECHOREQ; echoReq.icmpHdr.icmp_code = 0; echoReq.icmpHdr.icmp_cksum = 0; echoReq.icmpHdr.icmp_id = nId++; echoReq.icmpHdr.icmp_seq = nSeq++; for (nRet = 0; nRet < REQ_DATASIZE; nRet++) echoReq.cData[nRet] = ' '+nRet; echoReq.dwTime = GetTickCount(); echoReq.icmpHdr.icmp_cksum = checksum((u_short *)&echoReq, sizeof(ECHOREQUEST)); -----> nRet = sendto(s, echoReq, sizeof(ECHOREQUEST), 0, lpstToAddr, sizeof(SOCKADDR_IN)); return 0; } Re: Syntactical blunder. Ted Ferenc28-Sep-03 3:02 Ted Ferenc 28-Sep-03 3:02  try:- sendto(s, (char*) echoReq, sizeof(ECHOREQUEST), 0, lpstToAddr, sizeof(SOCKADDR_IN)); The spec says:- int sendto (<br /> SOCKET s, <br /> const char *buf, <br /> int len, <br /> int flags, <br /> const struct sockaddr *to, <br /> int tolen ); Hell, there are no rules here-- we're trying to accomplish something. - Thomas A. Edison Re: Syntactical blunder. Gary R. Wheeler28-Sep-03 5:22 Gary R. Wheeler 28-Sep-03 5:22  Try this: nRet = sendto(s, (char *)&echoReq, sizeof(ECHOREQUEST), 0, lpstToAddr, sizeof(SOCKADDR_IN)) Your original line says you want to pass echoReq by value, whereas you really want to pass a pointer to it. Software Zen: delete this; Why open two projects in the same VC IDE? George227-Sep-03 20:41 George2 27-Sep-03 20:41  Hello, everyone! I just copied a MFC project and double clicked the .dsw file, then I noticed that two MFC projects are loaded into the same IDE. I want to know for what purpose should us define two projects in the same .dsw file and open them in the same IDE. Do they have some relationships? Do they communicate with each other when running? I just want to know the general experience of this topic. Thanks in advance, George Re: Why open two projects in the same VC IDE? Andrew Walker27-Sep-03 23:38 Andrew Walker 27-Sep-03 23:38  You can add two projects, or more to a workspace to setup build dependancies between projects. For example. project A an executable depends on the project B a DLL. If you set dependancies you know you always have the most upto date copy. If you can keep you head when all about you Are losing theirs and blaming it on you; If you can dream - and not make dreams your master; If you can think - and not make thoughts you aim; Yours is the Earth and everything that's in it. Rudyard Kipling Re: Why open two projects in the same VC IDE? Mike Dimmick28-Sep-03 0:02 Mike Dimmick 28-Sep-03 0:02  It's also easier to debug both projects like this - you don't have to set up the 'Additional DLLs' box for any libraries you use. IntelliSense also works for using features of one project in another project (say, if one of the projects is a DLL that exports functions, you can get parameter information when trying to use that DLL). Re: Why open two projects in the same VC IDE? George228-Sep-03 4:00 George2 28-Sep-03 4:00  Thanks, Mike buddy! What means "IntelliSense" in your reply? regards, Geo Re: Why open two projects in the same VC IDE? Mike Dimmick28-Sep-03 4:16 Mike Dimmick 28-Sep-03 4:16  Microsoft's general term for context-sensitive popup information - for example, the list of available methods that pops up after you type the '.' after an object name, or '->' after a pointer name, or the list of parameters for a method. This information comes from a pre-parse of your declarations that the environment performs as you type. The parsed declarations are stored in the .NCB file with the same name as the project. This file is also used in the ClassView window - if VC ever complains that 'ClassView information is not available', it probably means that this file is read-only. Re: Why open two projects in the same VC IDE? George229-Sep-03 3:41 George2 29-Sep-03 3:41  Thanks, Mike buddy! Geo Re: Why open two projects in the same VC IDE? George228-Sep-03 3:59 George2 28-Sep-03 3:59  Thanks, Andrew buddy! Geo what this error means? coda_x27-Sep-03 20:20 coda_x 27-Sep-03 20:20  unresolved external symbol "public: __thiscall CDEPODLG::CDEPODLG(class CWnd *)" (??0CDEPODLG@@QAE@PAVCWnd@@@Z) Debug/mems_fab.exe : fatal error LNK1120: 1 unresolved externals what does this error means? Re: what this error means? Mike Dimmick28-Sep-03 0:05 Mike Dimmick 28-Sep-03 0:05  It means that the linker couldn't find a definition for the function it mentions (a constructor for the class CDEPODLG that takes a CWnd* parameter). Either you didn't include the source file that contains that function in the project, or you haven't implemented it. complicated problem coda_x27-Sep-03 19:41 coda_x 27-Sep-03 19:41  i have a database problem, description: i have dialog A with listbox and button A, based on what item user chose in listbox, i will pop up dialog B with the data record for that item when button A is pressed. Then in dialog B, user can edit the data of that current record, problem is whenevr user edit the current record, it actually overwrites my 1st record in the database. this means the pointer nt pointing to current record coz i open and find the record in dialog A's code then close database, then i open database again in dialog B, by then the pointer prob reset itself... how do i link these 2 dialogs with my edit working properly? Re: complicated problem Terry O'Nolley28-Sep-03 3:59 Terry O'Nolley 28-Sep-03 3:59  What SQL code are using for updating the record? Debugger can not find debugging information of a MFC project. George227-Sep-03 19:32 George2 27-Sep-03 19:32  Hello, everyone! After setting a break point on some statements, and run Build --> Start Debug --> Go from Build Menu of VC 6.0, the following dialog occurs: ---------- Does not contain debugging information. Press OK to continue. ---------- BTW: my project is a MFC project. How to enable debug ability in my project? Thanks in advance, George Re: Debugger can not find debugging information of a MFC project. Mike Dimmick28-Sep-03 0:10 Mike Dimmick 28-Sep-03 0:10  You're probably trying to debug a release build. For general debugging, you want to have a debug build. In the Build > Set Active Configuration dialog, you should have the configuration ending in 'Win32 Debug' selected. The message pops up because the executable doesn't contain a section called the Debug Directory, which tells the debugger where to find debugging information. This information takes up a lot of space, and so is only generated if you ask for it. If you need to debug a release build, you need to build it with debugging information turned on. In Project > Settings, select 'Win32 Release' in the Settings For box, then on the C++ tab, select the General category and select Program Database in the Debug Info drop-down. Then, on the Link tab, in the General category, check the Generate Debug Info box. Rebuild your project. Re: Debugger can not find debugging information of a MFC project. George228-Sep-03 4:03 George2 28-Sep-03 4:03  Thanks, Mike buddy! Geo How does DLL share functionality with other application? Link260027-Sep-03 17:15 Link2600 27-Sep-03 17:15  The book "Visual C++ .Net in 21 days" by SAMS in Chapter 14 said: DLL can share functionality with other application. That means DLL can let me build a set of application functionality to be used in an application that another programmer is building. But how? Right now I am building a project for my programming clas. The project is a music program, and I'm using some functionality wirtten by another programmer -- "speaker.dll" and "speak.c". Those files can let the computer make peep sound. Any idea how do I use it? Re: How does DLL share functionality with other application? twing27-Sep-03 19:24 twing 27-Sep-03 19:24  "speaker.dll" and "speak.h" should lie in your project directory. Usage: extern "C" void yourfun(); Hello World! Re: How does DLL share functionality with other application? Link260028-Sep-03 8:49 Link2600 28-Sep-03 8:49  What's that? extern "C void yourfun();"? Where should I put that statement? in the header file? Should I add it to my project like the header file? We need to add the header file to the project, then how about the speak.dll? Thanks Anyone know how to add a dll file into the project? Link260027-Sep-03 15:47 Link2600 27-Sep-03 15:47  I tried to add the speak.dll into my current project via the solution explorer, and added it to the reference. However I got an error. Anyone know what did I do wrong? How can I add a dll file into a project. Re: Anyone know how to add a dll file into the project? Adam °Wimsatt27-Sep-03 16:10 Adam °Wimsatt 27-Sep-03 16:10  What was the error? --Sig-- Adam Wimsatt The code is never buggy, it just has lots of fleatures. http://www.liquidneon.com/[^] Re: Anyone know how to add a dll file into the project? Link260027-Sep-03 16:50 Link2600 27-Sep-03 16:50  it said: "Add Reference: Error adding reference to the project." Templates 73Zeppelin27-Sep-03 13:16 73Zeppelin 27-Sep-03 13:16  Converting a class I have into a class template so that I can utilize it for various data types. I've never used templates before, and am trying to sort a few things out. In the class I currently hold data in an array of doubles by declaring a pointer to the data. <br /> double* m_pdData;<br /> and then initialize using the operator new. So that <br /> m_pdData = new[double dSize];<br /> I'm not entirely clear on how to declare these items in a templated version of the class. Would their equivalents be: <br /> T* m_pdData;<br /> and <br /> m_pdData = new[T dSize];<br /> or is there a little bit more to it?? Also, what is the notation convention? ie: for a member function that's a pointer to type double we prefix with m_pd for a template what would be the equivalent... m_p??? TIA. John Theal Physicist/Mathematical Programmer Digital Immersion Software Corporation Got CAD? http://www.presenter3d.com[^] http://www.merlin3d.com[^] Re: Templates spiritualfields27-Sep-03 13:40 spiritualfields 27-Sep-03 13:40  Change "m_pdData = new[T dSize];" to: m_pdData = new T[dSize];

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