BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How to find if a DLL is still loaded Goto page 1, 2  Next          BorlandTalk.com Forum Index -> C++ Builder (Native API) View previous topic :: View next topic   Author Message David Guest Posted: Mon Apr 10, 2006 4:23 am    Post subject: How to find if a DLL is still loaded I wish to know if a DLL which is loaded from another process is still loaded and running. I don't call the DLL myself but just wish to know if it is still loaded in memory. Is this possible ?? thanks in advance David Back to top Bob Gonder Guest Posted: Mon Apr 10, 2006 6:03 pm    Post subject: Re: How to find if a DLL is still loaded Boba wrote: Quote: "David" wrote in message I wish to know if a DLL which is loaded from another process is still loaded and running. I don't call the DLL myself but just wish to know if it is still loaded in memory. try to rename/delete the file. Might be nicer to use if( 0 == access(filename,2) ) { //DLL is free }else{ //DLL in use or read-only } Back to top Boba Guest Posted: Mon Apr 10, 2006 6:03 pm    Post subject: Re: How to find if a DLL is still loaded "David" <davids (AT) unite (DOT) com.au> wrote in message news:443a4e43$1 (AT) newsgroups (DOT) borland.com... Quote: I wish to know if a DLL which is loaded from another process is still loaded and running. I don't call the DLL myself but just wish to know if it is still loaded in memory. Is this possible ?? thanks in advance David try to rename/delete the file. Back to top Dennis Jones Guest Posted: Mon Apr 10, 2006 8:03 pm    Post subject: Re: How to find if a DLL is still loaded "David" <davids (AT) unite (DOT) com.au> wrote in message news:443a4e43$1 (AT) newsgroups (DOT) borland.com... Quote: I wish to know if a DLL which is loaded from another process is still loaded and running. I don't call the DLL myself but just wish to know if it is still loaded in memory. Is this possible ?? There's probably an easier way, but the first thing that comes to mind is to enumerate the modules loaded by each process currently running on the system, looking for the one you're interested in. If you don't find it, it isn't loaded. See the following link for how to enumerate all of the processes and modules in the system: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/perfmon/bas e/taking_a_snapshot_and_viewing_processes.asp - Dennis Back to top Dennis Jones Guest Posted: Mon Apr 10, 2006 9:03 pm    Post subject: Re: How to find if a DLL is still loaded "Dennis Jones" <nospam (AT) nospam (DOT) com> wrote in message news:443aac3c$1 (AT) newsgroups (DOT) borland.com... Quote: There's probably an easier way, but the first thing that comes to mind is to enumerate the modules loaded by each process currently running on the system, looking for the one you're interested in. If you don't find it, it isn't loaded. Here's a quick and dirty implementation: bool IsDLLLoaded( const AnsiString &DLLName ) { bool bIsDLLLoaded = false; HANDLE hProcessSnapshot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 ); if ( INVALID_HANDLE_VALUE != hProcessSnapshot ) { PROCESSENTRY32 ProcessEntry; ProcessEntry.dwSize = sizeof( ProcessEntry ); for ( bool bProcessFound = Process32First( hProcessSnapshot, &ProcessEntry ); bProcessFound; bProcessFound = Process32Next( hProcessSnapshot, &ProcessEntry ) ) { HANDLE hModuleSnapshot = CreateToolhelp32Snapshot( TH32CS_SNAPMODULE, ProcessEntry.th32ProcessID ); if ( INVALID_HANDLE_VALUE != hModuleSnapshot ) { MODULEENTRY32 ModuleEntry; ModuleEntry.dwSize = sizeof( ModuleEntry ); for ( bool bModuleFound = Module32First( hModuleSnapshot, &ModuleEntry ); bModuleFound; bModuleFound = Module32Next( hModuleSnapshot, &ModuleEntry ) ) { if ( DLLName == ModuleEntry.szModule ) { bIsDLLLoaded = true; break; } } } CloseHandle( hModuleSnapshot ); if ( bIsDLLLoaded ) { break; } } CloseHandle( hProcessSnapshot ); } return bIsDLLLoaded; } - Dennis Back to top Ed Mulroy Guest Posted: Mon Apr 10, 2006 10:06 pm    Post subject: Re: How to find if a DLL is still loaded I think that worked under 16 bit Windows but under Win32 I don't think access will tell if the file is loaded. It calls GetFileAttribues and massages the result to decide what to return. Nothing in the result tells if the file is loaded. .. Ed Quote: Bob Gonder wrote in message news:tf3l32phnths5uo1u53tbh73rsl42315mr (AT) 4ax (DOT) com... I wish to know if a DLL which is loaded from another process is still loaded and running. I don't call the DLL myself but just wish to know if it is still loaded in memory. try to rename/delete the file. Might be nicer to use if( 0 == access(filename,2) ) { //DLL is free }else{ //DLL in use or read-only } Back to top Bob Gonder Guest Posted: Mon Apr 10, 2006 10:06 pm    Post subject: Re: How to find if a DLL is still loaded Ed Mulroy wrote: Quote: I think that worked under 16 bit Windows but under Win32 I don't think access will tell if the file is loaded. It calls GetFileAttribues and massages the result to decide what to return. Nothing in the result tells if the file is loaded. Ok, then open file with write access will fail if in use, and doesn't mess with the file if it isn't in use, as rename or delete would. Back to top Boba Guest Posted: Tue Apr 11, 2006 5:03 pm    Post subject: Re: How to find if a DLL is still loaded "Dennis Jones" <nospam (AT) nospam (DOT) com> wrote in message news:443aac3c$1 (AT) newsgroups (DOT) borland.com... Quote: ... There's probably an easier way, but the first thing that comes to mind is to enumerate the modules loaded by each process currently running on the system, looking for the one you're interested in. If you don't find it, it isn't loaded. been there, done that... if a module is not curremtly beeing used by any of the software visible to UI via what you're talking about, there are still tons of software running in below UI level that may still need those modules in which case you may think the module is not in use: try to delete... if it fails - keep digging deeper. I still don't understand what David (the op) is trying to achieve. Back to top David Guest Posted: Tue Apr 11, 2006 5:56 pm    Post subject: Re: How to find if a DLL is still loaded Quote: I still don't understand what David (the op) is trying to achieve. The DLL sends messages to my app but I don't send messages back. If the user exits the app then I would like to warn the user that there is still a DLL trying to communicate with it before the user exits. Therefore I need to know if the DLL is still in use. Actually I do have access to source code for the DLL so maybe I could do something from the DLL end. I asked here once whether or not you could send messages to a DLL and it wasn't a simple proposition either. regards david "Boba" <Boba (AT) somewhere (DOT) world> wrote in message news:443bd8e0$1 (AT) newsgroups (DOT) borland.com... Quote: "Dennis Jones" <nospam (AT) nospam (DOT) com> wrote in message news:443aac3c$1 (AT) newsgroups (DOT) borland.com... ... There's probably an easier way, but the first thing that comes to mind is to enumerate the modules loaded by each process currently running on the system, looking for the one you're interested in. If you don't find it, it isn't loaded. been there, done that... if a module is not curremtly beeing used by any of the software visible to UI via what you're talking about, there are still tons of software running in below UI level that may still need those modules in which case you may think the module is not in use: try to delete... if it fails - keep digging deeper. I still don't understand what David (the op) is trying to achieve. Back to top Dennis Jones Guest Posted: Tue Apr 11, 2006 7:03 pm    Post subject: Re: How to find if a DLL is still loaded "Boba" <Boba (AT) somewhere (DOT) world> wrote in message news:443bd8e0$1 (AT) newsgroups (DOT) borland.com... Quote: been there, done that... if a module is not curremtly beeing used by any of the software visible to UI via what you're talking about, there are still tons of software running in below UI level that may still need those modules in which case you may think the module is not in use: try to delete... if it fails - keep digging deeper. Can you explain what you mean by, "visible to the UI" and "below UI level"? CreateToolhelp32Snapshot has no notion of what's "visible to the UI" or "below UI level." According to MSDN, using the TH32CS_SNAPPROCESS flag results in a list of "...all processes in the system." Can you provide an example of a process that would not be in the list of "all processes in the system?" - Dennis Back to top Boba Guest Posted: Wed Apr 12, 2006 6:03 pm    Post subject: Re: How to find if a DLL is still loaded "David" <davids (AT) unite (DOT) com.au> wrote in message news:443c5e6a (AT) newsgroups (DOT) borland.com... Quote: ... Actually I do have access to source code for the DLL ... that always helps. Quote: I asked here once whether or not you could send messages to a DLL and it wasn't a simple proposition either. a dll is no different from any other application with an msg pump. Back to top David Guest Posted: Wed Apr 12, 2006 9:36 pm    Post subject: Re: How to find if a DLL is still loaded Hello Boba So how do you tap into the message que of a DLL ?? Do you have any examples ?? Regards David "Boba" <Boba (AT) somewhere (DOT) world> wrote in message news:443d2e58$1 (AT) newsgroups (DOT) borland.com... Quote: "David" <davids (AT) unite (DOT) com.au> wrote in message news:443c5e6a (AT) newsgroups (DOT) borland.com... ... Actually I do have access to source code for the DLL ... that always helps. I asked here once whether or not you could send messages to a DLL and it wasn't a simple proposition either. a dll is no different from any other application with an msg pump. Back to top David Guest Posted: Thu Apr 13, 2006 6:08 am    Post subject: Re: How to find if a DLL is still loaded Hello The DLL is loaded after the exceutable is run. I don't have access to the source code of the calling app, only the DLL. regards david "Boba" <Boba (AT) somewhere (DOT) world> wrote in message news:443e5780$1 (AT) newsgroups (DOT) borland.com... Quote: "David" <davids (AT) unite (DOT) com.au> wrote in message news:443de373 (AT) newsgroups (DOT) borland.com... Hello Boba So how do you tap into the message que of a DLL ?? Do you have any examples ?? Regards David Hello David; are you talking about a dll loaded prio your code starts? is it a library you attach? is it something you coded? Back to top Boba Guest Posted: Thu Apr 13, 2006 3:03 pm    Post subject: Re: How to find if a DLL is still loaded "David" <davids (AT) unite (DOT) com.au> wrote in message news:443de373 (AT) newsgroups (DOT) borland.com... Quote: Hello Boba So how do you tap into the message que of a DLL ?? Do you have any examples ?? Regards David Hello David; are you talking about a dll loaded prio your code starts? is it a library you attach? is it something you coded? Back to top Boba Guest Posted: Thu Apr 13, 2006 3:03 pm    Post subject: Re: How to find if a DLL is still loaded "Dennis Jones" <nospam (AT) nospam (DOT) com> wrote in message news:443bf6f6$1 (AT) newsgroups (DOT) borland.com... Quote: ... Can you provide an example of a process that would not be in the list of "all processes in the system?" if you have an nt handy, look to see if the Client Server Runtime Process is running; if so - is the module loaded? what do you use to list 'all' the modules curently loaded? Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> C++ Builder (Native API) All times are GMT Goto page 1, 2  Next Page 1 of 2   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.