BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Delphi Record types in VC++          BorlandTalk.com Forum Index -> Delphi ActiveX Controls Development View previous topic :: View next topic   Author Message Sam Guest Posted: Tue Nov 18, 2003 1:39 pm    Post subject: Delphi Record types in VC++ Hi, How do I pass records as arguments in an ActiveX Control. I have the following record which I've created in the Type Library: xRect = record Left, Top, Right, Bottom: Double end; And, my method for accepting it as argument is as follows: procedure Method1(aRect: xRect); safecall; This ActiveX works perfectly when imported and used in Delphi! BUT, when I tried it in Visual C++ 6.0, .... this method is not exposed. When I checked in the header file, I found the following commented statement instead of the method: "// method 'Method1' not emitted because of invalid return type or parameter type" Why is this happening? How do I expose the Record (strut) types in VC++? Thanks in advance. -- Sam Back to top Brian Cook Guest Posted: Tue Nov 18, 2003 5:28 pm    Post subject: Re: Delphi Record types in VC++ Quote: Hi, Greetings. Quote: Why is this happening? Delphi probably passes records differently than Visual C. Quote: How do I expose the Record (strut) types in VC++? Make the parameter a "const". It should be treated as a "pointer to a structure" in Visual C... procedure Method1( const aRect: xRect ); safecall; If "const" doesn't work you will have to declare the parameter as a pointer to a record... type PRect = ^xRect; procedure Method1( aRect: PRect ); safecall; Good luck, Brian Back to top Sam Guest Posted: Wed Nov 19, 2003 6:36 am    Post subject: Re: Delphi Record types in VC++ Hi, Quote: Make the parameter a "const". It should be treated as a "pointer to a structure" in Visual C... procedure Method1( const aRect: xRect ); safecall; How can I give this in a Type Library? If the type is given as WideString, delphi automatically takes it as 'const'. But how do I specify a record to be taken as 'const'? Quote: If "const" doesn't work you will have to declare the parameter as a pointer to a record... type PRect = ^xRect; procedure Method1( aRect: PRect ); safecall; This too can't be specified exactly in a Type Library. But I tried giving it as 'var' parameter, which didn't make any difference in VC++. procedure Method1(var aRect: xRect); safecall; Still the above method gets omitted in VC++. Thanks, -- Sam. "Brian Cook" <bcook@rowdydogsoftware[REMOVE].com> wrote Quote: Hi, Greetings. Why is this happening? Delphi probably passes records differently than Visual C. How do I expose the Record (strut) types in VC++? Make the parameter a "const". It should be treated as a "pointer to a structure" in Visual C... procedure Method1( const aRect: xRect ); safecall; If "const" doesn't work you will have to declare the parameter as a pointer to a record... type PRect = ^xRect; procedure Method1( aRect: PRect ); safecall; Good luck, Brian Back to top Brian Cook Guest Posted: Wed Nov 19, 2003 7:08 am    Post subject: Re: Delphi Record types in VC++ Quote: Hi, Greetings. Quote: Make the parameter a "const". It should be treated as a "pointer to a structure" in Visual C... procedure Method1( const aRect: xRect ); safecall; How can I give this in a Type Library? If the type is given as WideString, delphi automatically takes it as 'const'. But how do I specify a record to be taken as 'const'? I have no idea. I just assumed it was possible. Quote: If "const" doesn't work you will have to declare the parameter as a pointer to a record... type PRect = ^xRect; procedure Method1( aRect: PRect ); safecall; This too can't be specified exactly in a Type Library. Really? Obviously, I went crazy with assumptions. This time I assumed pointers would always be usable in a type-library. I'm sorry for leading you astray and embarrassed and the quantity of bad advice I've delivered! Quote: But I tried giving it as 'var' parameter, which didn't make any difference in VC++. procedure Method1(var aRect: xRect); safecall; Still the above method gets omitted in VC++. The only other thing I can think of is to declare Method1 to take a generic pointer... procedure Method1( aRect: Pointer ); safecall; ....in which case you'll have to perform a type-cast... PRect(aRect)^.Left := 13; ....and the Visual C side will not be declared correctly; also requiring a type-cast. Good luck, Brian Back to top Sam Guest Posted: Wed Nov 19, 2003 11:21 am    Post subject: Re: Delphi Record types in VC++ Anybody has any solution to this problem? -- Sam. "Sam" <anishsam (AT) gnostice (DOT) com> wrote Quote: Hi, How do I pass records as arguments in an ActiveX Control. I have the following record which I've created in the Type Library: xRect = record Left, Top, Right, Bottom: Double end; And, my method for accepting it as argument is as follows: procedure Method1(aRect: xRect); safecall; This ActiveX works perfectly when imported and used in Delphi! BUT, when I tried it in Visual C++ 6.0, .... this method is not exposed. When I checked in the header file, I found the following commented statement instead of the method: "// method 'Method1' not emitted because of invalid return type or parameter type" Why is this happening? How do I expose the Record (strut) types in VC++? Thanks in advance. -- Sam Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi ActiveX Controls Development 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.