BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Start a Child Application in a Window          BorlandTalk.com Forum Index -> C++ Builder (Native API) View previous topic :: View next topic   Author Message David Guest Posted: Thu Apr 26, 2007 1:39 pm    Post subject: Start a Child Application in a Window Is it possible to create a new process within (limited to) a given window of a running process - like for instance, Adobe Acrobat starting up to display a .pdf within Internet Explorer? What I am hoping to do is to display files of different types from an archive within the window of a vcl control, using their varying display applications. I have tried ShellExecute with the window parameter set to the handle of an existing control but this does not seem to help. Any other suggestions, please? Or can someone suggest a simpler way of achieving the objective? Regards, David Back to top Remy Lebeau (TeamB) Guest Posted: Thu Apr 26, 2007 10:08 pm    Post subject: Re: Start a Child Application in a Window "David" <david (AT) pedley (DOT) ws> wrote in message news:46306533$1 (AT) newsgroups (DOT) borland.com... Quote: Is it possible to create a new process within (limited to) a given window of a running process - like for instance, Adobe Acrobat starting up to display a .pdf within Internet Explorer? Acrobat implements an ActiveX control that IE loads to display pdf files. It does not load the main Acrobat application and then position it inside the IE window. The ActiveX control handles the display internally. Quote: What I am hoping to do is to display files of different types from an archive within the window of a vcl control, using their varying display applications. Unless those applications implement their own containable ActiveX controls like Adobe does, then your only option is to start an application, then manually find its window(s), such as with EnumWindows() and GetWindowThreadProcessId() (use CreateProcess() instead of ShellExecute() in order to get the thread and process IDs of the application), and then use SetParent() to manually set them as children for your own UI window. Quote: I have tried ShellExecute with the window parameter set to the handle of an existing control but this does not seem to help. That is not what the hwnd parameter of ShellExecute() is for. Gambit Back to top David Guest Posted: Wed May 02, 2007 2:41 pm    Post subject: Re: Start a Child Application in a Window Remy, Thanks. I have tried using EnumWindows() and GetWindowThreadProcessId() to enumerate all of the 'top level' threads/processes active on the workstation (a large number). However, none of these matches the thread or process ids returned by the CreateProcess(). Is it possible that the new process was created as a child of something? I was running the test from the IDE. If so, is there a better way than enumerating all the child processes of each top process? Incidentally, had somewhat of a struggle to get the callback to EnumWindows() working. The first parameter of EnumWindows is a pointer to the callback routine which is defined as WNDENUMPROC, which in turn is defined as int __stdcall CbFunction () whereas the callback routine required is actually int __stdcall CbFunction (HWND w, LPARAM parm) This means defining the latter and casting its pointer to the former when specifying the EnumWindows parameter - hardly sophisticated practice. Is this a bug in the header files or am I missing something obvious? Regards, David "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote in message news:4630dd2e (AT) newsgroups (DOT) borland.com... Quote: "David" <david (AT) pedley (DOT) ws> wrote in message news:46306533$1 (AT) newsgroups (DOT) borland.com... Is it possible to create a new process within (limited to) a given window of a running process - like for instance, Adobe Acrobat starting up to display a .pdf within Internet Explorer? Acrobat implements an ActiveX control that IE loads to display pdf files. It does not load the main Acrobat application and then position it inside the IE window. The ActiveX control handles the display internally. What I am hoping to do is to display files of different types from an archive within the window of a vcl control, using their varying display applications. Unless those applications implement their own containable ActiveX controls like Adobe does, then your only option is to start an application, then manually find its window(s), such as with EnumWindows() and GetWindowThreadProcessId() (use CreateProcess() instead of ShellExecute() in order to get the thread and process IDs of the application), and then use SetParent() to manually set them as children for your own UI window. I have tried ShellExecute with the window parameter set to the handle of an existing control but this does not seem to help. That is not what the hwnd parameter of ShellExecute() is for. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Wed May 02, 2007 10:00 pm    Post subject: Re: Start a Child Application in a Window "David" <david (AT) pedley (DOT) ws> wrote in message news:46385cda$1 (AT) newsgroups (DOT) borland.com... Quote: I have tried using EnumWindows() and GetWindowThreadProcessId() to enumerate all of the 'top level' threads/processes active on the workstation (a large number). However, none of these matches the thread or process ids returned by the CreateProcess(). Yes, they will. Please show your actual code. I would also suggest calling WaitForInputIdle() before calling EnumWindows(), to give the new process some time to create and show its windows. Quote: Is it possible that the new process was created as a child of something? I was running the test from the IDE. No. That wouldn't matter anyway, since you have the IDs of the new process itself. Each window belongs to a specific process, even if it were a child process. Quote: Incidentally, had somewhat of a struggle to get the callback to EnumWindows() working. The first parameter of EnumWindows is a pointer to the callback routine which is defined as WNDENUMPROC, which in turn is defined as int __stdcall CbFunction () whereas the callback routine required is actually int __stdcall CbFunction (HWND w, LPARAM parm) This means defining the latter and casting its pointer to the former when specifying the EnumWindows parameter Yes. Quote: hardly sophisticated practice. No, but it is required practice in this particular case. Just one of many quirks in how the Win32 API operates in general. Quote: Is this a bug in the header files No. Gambit 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 Page 1 of 1   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.