C / C++ / MFC

FirstPrevNext

Re: delete Vivek Rajan16-Jan-02 4:47 Vivek Rajan 16-Jan-02 4:47  If single threaded use this: ---------------------------- extern char * buf; void func1(){ if (buf) { delete buf;buf == NULL;} } void func2(){ if (buf) { delete buf;buf = NULL;} } If multi threaded use this : ---------------------------- extern char * buf; extern CRITICAL_SECTION cs1; void func1(){ EnterCriticalSection(&cs1); if (buf) { delete buf;buf=NULL; } LeaveCriticalSection(&cs1); } // same for func2 // see MSDN for use of CriticalSection What to do to get rid from this error "Dll Function call crashed"? Daed16-Jan-02 4:20 Daed 16-Jan-02 4:20  I am trying to call a DLL function from InstallShield but the setup always give me an error "DLL Function call crashed". The DLL is loaded successfully and the function is called as well but what happens after that is my big problem! My DLL is built using MFC Wizard, I defined the exported DLL in .DEF Please help me, what wrong did I do? May be I should create the DLL in another way!? Re: What to do to get rid from this error "Dll Function call crashed"? Joaquín M López Muñoz16-Jan-02 9:28 Joaquín M López Muñoz 16-Jan-02 9:28  It is hard to say without having more info. One wild guess: have you tried declaring your function with the WINAPI specifier? Joaquín M López Muñoz Telefónica, Investigación y Desarrollo Re: What to do to get rid from this error "Dll Function call crashed"? Daed16-Jan-02 20:58 Daed 16-Jan-02 20:58  No, I did not use WINAPI. Now after I used it, the problem was solved but I have another error message: "DLL function call resulted in bad stack. Possible incorrect prototyping". The function declaration in the DLL is: long WINAPI CApp::SetFunction() The prototype declaration in InstallShield is: Prototype stdcall long MyDll.SetFunction(); I tried using the other declaration: Prototype cdecl long MyDll.SetFunction(); What should I do?! Thank you for you help. Re: What to do to get rid from this error "Dll Function call crashed"? Joaquín M López Muñoz16-Jan-02 21:20 Joaquín M López Muñoz 16-Jan-02 21:20  Is by chance your function non-static? Joaquín M López Muñoz Telefónica, Investigación y Desarrollo Re: What to do to get rid from this error "Dll Function call crashed"? Daed16-Jan-02 21:39 Daed 16-Jan-02 21:39  Yes it is non static. Re: What to do to get rid from this error "Dll Function call crashed"? Joaquín M López Muñoz16-Jan-02 21:50 Joaquín M López Muñoz 16-Jan-02 21:50  If you can afford declaring it as static, I think that'd solve the problem. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo Re: What to do to get rid from this error "Dll Function call crashed"? Daed16-Jan-02 22:24 Daed 16-Jan-02 22:24  If i decalre my function as static, then i cannot export it, then the InstallShield will not be able to find my function and read it. I guess my problem is when the value is returned to InstallShield. Can you please explain to me more why you suggested the static function? may be i am missing a something here? Re: What to do to get rid from this error "Dll Function call crashed"? Joaquín M López Muñoz17-Jan-02 1:58 Joaquín M López Muñoz 17-Jan-02 1:58  If I'm not wrong, your function is not a stand alone function, but rather a member function of a class of yours named CApp. Then, declaring it as static does not have the same meaning as with a stand alone function, it merely says that this member function can be called without bounding to any instance of CApp. Try modifying your .h like this: class CApp{ ... static long WINAPI SetFunction(); ...); and do not make any other change: this should fix the problem. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo Re: What to do to get rid from this error "Dll Function call crashed"? Daed17-Jan-02 2:51 Daed 17-Jan-02 2:51  Yes, my function is not a stand alone function, it is a member function of a class. I tried to declare it the way you told me but it didn't work either I am thinking that may be i built the DLL in a wrong way? My DLL was built using MFC App Wizard (Dynamic DLL). Can you advice me if what I did is wrong or what type of DLL I should use? Thank you. Re: What to do to get rid from this error "Dll Function call crashed"? Joaquín M López Muñoz17-Jan-02 3:09 Joaquín M López Muñoz 17-Jan-02 3:09  Dynamic MFC linking... Check MSDN article HOWTO: Properly Export Functions Using the MFC Shared Library (Q140850). Apart from this, rest asured that an MFC DLL can be called from InstallShield (hey, I did it ). I'd need some code snippets to be able to tell you more about your problem (if the AFX_MANAGE_STATE didn't fix it). Joaquín M López Muñoz Telefónica, Investigación y Desarrollo about Flat-ToolBar 16-Jan-02 4:09 16-Jan-02 4:09  I want to make flat-toolbar,like office 2000 or VC++,etc. I downloaded many Flat Tool-Bar sample.But Enyone use CToolbarEx.I want to use it easily,I don't want to spend 'Looking'. Please tell me better source. Selecting Printer in CWebBrowser2 Ctrl jerry0davis16-Jan-02 4:08 jerry0davis 16-Jan-02 4:08  I have a web page displayed in a CWebBrowser2 control. The print the contents of the web page is use ExecWB(OLECMDID_PRINT, OLECMDEXECOPT_PROMPTUSER, NULL, NULL);. This displays the standard print dialog window and allows the user to select the printer to print with. If I use OLECMDEXECOPT_DONTPROMPTUSER the default printer is used. I'd like to specify which printer to print to without displaying the default print dialog window. Can I use the last two ExecWB parmeters perhaps? Anyone got any ideas please? Jeremy Davis http://www.astad.org waveOutGetNumDevs Mark Donkers16-Jan-02 3:36 Mark Donkers 16-Jan-02 3:36  Hello, I'm trying to query whether the PC has a soundcard or not. I #include <mmsystem.h>, and I try to use waveOutGetNumDevs(), but I get the following linker error. MainFrm.obj : error LNK2001: unresolved external symbol __imp__waveOutGetNumDevs@0 Debug/Clockster.exe : fatal error LNK1120: 1 unresolved externals What am I missing? Thanks in advance. Marcus Make no little plans; they have no magic to stir your blood to action. Make big plans, aim high in work and hope -- Daniel Burnham Re: waveOutGetNumDevs Bernhard16-Jan-02 4:05 Bernhard 16-Jan-02 4:05  do you link to the "Winmm.lib" ? Project Settings / Linker and add that library to the list.. i have not used this function ever before.. but i think this should work bernhard Sometimes I think the surest sign for intelligent life elsewhere in the universe is that none of them ever tried to contact us. Re: waveOutGetNumDevs Ernest Laurentin16-Jan-02 4:16 Ernest Laurentin 16-Jan-02 4:16  Add this to your stdafx.h #pragma comment(lib, "winmm") - God bless the World Re: waveOutGetNumDevs Mark Donkers16-Jan-02 5:04 Mark Donkers 16-Jan-02 5:04  Gentlemen, Thank you for the solutions. I went Ernest's so that I can keep it in the source files. Have a good one... Marcus Make no little plans; they have no magic to stir your blood to action. Make big plans, aim high in work and hope -- Daniel Burnham Communication between classes and some graphics 16-Jan-02 3:30 16-Jan-02 3:30  I'm trying to make a model rocket simulation where the user can selection file>options from the menu, enter in the rocket data and I'll display a simulation of the rocket flying in the air. I have the dialog box get the data, I have the functions to do the actual simulation, now I just need to know how to get that data from the dialog box once the user hits OK and then draw the results (I know about the draw functions using dc, but not how to properly implement them in this case). Also, I have three functions which I use for the simulation, what class should I make them a part of (one does the math, other draws and the third calls the other two). ie. void doSimulation() { //get data (gravity, mass, etc) from dialog box for (i=0;i Re: Communication between classes and some graphics 567890123416-Jan-02 4:16 5678901234 16-Jan-02 4:16  Maybe MFC sample Fire can help you. This is dialog-based application with lot of controls and dynamically created image. User changes fire parameters and program redraws the image according to them. You can use this fire for your rocket... passing an argument to an executable file JCY16-Jan-02 3:24 JCY 16-Jan-02 3:24  Just an inquiry... How do I implement my program so that if I made it an executable file, it's possible to pass "arguments/parameters" to the executable file when it is called... i.e. if I made my BOOk Program as an executable file and I want my executable file of the Book program to accept video file parameters, how do I do this? In analogy, if i want to open the realplayer.Exe, i command a SHELLEXECUTE with the *.rm file as paramenter and the realplayer automatically opens it. Thanks in Advance. Best Wishes to all. Re: passing an argument to an executable file Chris Losinger16-Jan-02 3:28 Chris Losinger 16-Jan-02 3:28  pass the parameters on the command line: c:\> MyApp.EXE file.ext in your app, use one of the many command line parsers available here to grab the parameters and act accordingly. -c Smaller Animals Software, Inc. Re: passing an argument to an executable file JCY16-Jan-02 3:39 JCY 16-Jan-02 3:39  Sorry, u might have misunderstood my question 'cuz it seems a little bit confusing... to clarify: I'll set an example. I have two programs: "X" and "Y" program. -I programmed X to process video files. then convert it to executable file -I have another program Y which calls this executable file of X (X.exe) with a VIDEO FILE parameter possibly using the command ShellExecute (hwnd, "open", "X.exe", [Video File PathName], [Directory of Executable File], SW_SHOWNORMAL); so the question is, how do i Program X so that it can accept the VIDEO FILE parameter of Y. and open it afterwards. Y ---video file ---> X.exe Thanks in Advance... Re: passing an argument to an executable file Rick Crone16-Jan-02 4:39 Rick Crone 16-Jan-02 4:39  The command line parameters can be used in the InitInstance() of your application. The command line is stored in m_lpCmdLine which is a char array. If you pass your parameter with a slash (ie. /MYPARM) they will be considered flags. If you don't include the slash the first parameter will be considered to be the file you want to open. You can turn off that behavior my setting: cmdIndo.mShellCommand = CCommandLineInfo::FileNew; but why not just include the slash? *NOTE you can test your command line parameter in the developer studio! see the PROJECT - SETTINGS - DEBUG(tab) I usually deal with the command line in my applications InitInstance() just before: // Parse command line for standard shell commands, DDE, file open CCommandLineInfo cmdInfo; ParseCommandLine(cmdInfo); Re: passing an argument to an executable file JCY16-Jan-02 4:54 JCY 16-Jan-02 4:54  Thanks a lot .. I'll try to implement your suggestion. Enumerating Network Servers Giles16-Jan-02 2:59 Giles 16-Jan-02 2:59  Hi, Does anyone know how to go about programatically enumerating the network server dns name etc, on a mapped dive under NT? Say I have a drive H:\ I can see that the server path is 'trtdatasrv\data' in Explorer. I have a database for cataloging files, but need to know if the user is pointing to the same H drive as well as others, and if not map to it. Thanks, Giles

Last Visit: 31-Dec-99 18:00     Last Update: 24-Sep-24 12:24 Refresh ᐊ Prev1...17591175921759317594175951759617597175981759917600 Next ᐅ

General    News    Suggestion    Question    Bug    Answer    Joke    Praise    Rant    Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.