BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  COPYDATASTRUCT problem          BorlandTalk.com Forum Index -> C++ Builder (Native API) View previous topic :: View next topic   Author Message Nate Lockwood Guest Posted: Sun Feb 26, 2006 12:03 am    Post subject: COPYDATASTRUCT problem I send a message to a already running application from one that has just been started. This works just fine AFAIK except when I try to get to the LParam. Eventually I expect to retrieve a char string. I get this error: [C++ Error] Main.cpp(171): E2316 'WParam' is not a member of 'tagMSG' I'm perplexed since I got this line from another post by a TeamB member. Nate void __fastcall TFormMain::AppMessage(MSG &Msg, bool &Handled) { if( (Msg.message == WM_MYMSG) && (WM_MYMSG != 0) ) { COPYDATASTRUCT* cds = reinterpret_cast <COPYDATASTRUCT*>(Msg.LParam); // compile error FileList->Clear(); // TStringList * Application->Restore(); Show(); Handled = true; } else Handled = false; } Back to top Jonathan Benedicto Guest Posted: Sun Feb 26, 2006 1:03 am    Post subject: Re: COPYDATASTRUCT problem Dennis Jones wrote: Quote: So you should always do a little extra research after you receive some sample code to make sure that it correctly applies to your situation and/or that is written correctly. I wait for the compiler to tell me that :-) Jonathan Back to top Dennis Jones Guest Posted: Sun Feb 26, 2006 1:03 am    Post subject: Re: COPYDATASTRUCT problem "Nate Lockwood" <RNLockwoodREMOVE (AT) attglobal (DOT) net> wrote in message news:4400e10b$1 (AT) newsgroups (DOT) borland.com... Quote: I send a message to a already running application from one that has just been started. This works just fine AFAIK except when I try to get to the LParam. Eventually I expect to retrieve a char string. I get this error: [C++ Error] Main.cpp(171): E2316 'WParam' is not a member of 'tagMSG' Read the help. Or look at the header file (winuser.h) where tagMSG is declared. You will see that the members are 'wParam' and 'lParam' (note the lower-case 'W' and 'L'). Quote: I'm perplexed since I got this line from another post by a TeamB member. TeamB members aren't perfect -- they make mistakes just like the rest of us mortals. So just because you got something from a TeamB member doesn't necessarily mean it's accurate. Many times people here answer questions with pseudo-code or don't bother testing what they use as an example. So you should always do a little extra research after you receive some sample code to make sure that it correctly applies to your situation and/or that is written correctly. - Dennis Back to top Jonathan Benedicto Guest Posted: Sun Feb 26, 2006 1:03 am    Post subject: Re: COPYDATASTRUCT problem Nate Lockwood wrote: Quote: I send a message to a already running application from one that has just been started. This works just fine AFAIK except when I try to get to the LParam. Eventually I expect to retrieve a char string. I get this error: Use .lParam and .wParam HTH Jonathan Back to top Nate Lockwood Guest Posted: Sun Feb 26, 2006 2:03 am    Post subject: Re: COPYDATASTRUCT problem Jonathan Benedicto wrote: Quote: I wait for the compiler to tell me that :-) Yeah, a lot of people don't know that its primary use is as a syntax checker. Nate Back to top Nate Lockwood Guest Posted: Sun Feb 26, 2006 2:03 am    Post subject: Re: COPYDATASTRUCT problem Dennis Jones wrote: Quote: TeamB members aren't perfect -- they make mistakes just like the rest of us mortals. So just because you got something from a TeamB member doesn't necessarily mean it's accurate. Actually I was kind of amused as well as perplexed as the thread this was in continued on for some time with several other posts but no comment on the error. Thanks Nate Back to top Nate Lockwood Guest Posted: Sun Feb 26, 2006 2:03 am    Post subject: Re: COPYDATASTRUCT problem Dennis Jones wrote: Quote: Read the help. Or look at the header file (winuser.h) where tagMSG is declared. You will see that the members are 'wParam' and 'lParam' (note the lower-case 'W' and 'L'). I knew it was simple, thanks. Nate Back to top Ed Mulroy Guest Posted: Sun Feb 26, 2006 2:03 am    Post subject: Re: COPYDATASTRUCT problem Quote: TeamB members aren't perfect -- they make mistakes just like the rest of us mortals. Oh darn. Now that you've told them they'll know :-( .. Ed Quote: Dennis Jones wrote in message news:4400f58a$1 (AT) newsgroups (DOT) borland.com... Back to top Dennis Jones Guest Posted: Mon Feb 27, 2006 2:03 am    Post subject: Re: COPYDATASTRUCT problem "Jonathan Benedicto" <invalid (AT) nobody (DOT) com> wrote in message news:4400f5e7$1 (AT) newsgroups (DOT) borland.com... Quote: Dennis Jones wrote: So you should always do a little extra research after you receive some sample code to make sure that it correctly applies to your situation and/or that is written correctly. I wait for the compiler to tell me that If the bad code will result in a compiler error, that's fine. But if not...well, you know, good luck! :-) - Dennis Back to top Dennis Jones Guest Posted: Mon Feb 27, 2006 2:03 am    Post subject: Re: COPYDATASTRUCT problem "Ed Mulroy" <dont_email_me (AT) bitbuc (DOT) ket> wrote in message news:4400fbce$1 (AT) newsgroups (DOT) borland.com... Quote: TeamB members aren't perfect -- they make mistakes just like the rest of us mortals. Oh darn. Now that you've told them they'll know Sorry...I thought it was public knowledge! - Dennis Back to top Remy Lebeau (TeamB) Guest Posted: Mon Feb 27, 2006 10:03 pm    Post subject: Re: COPYDATASTRUCT problem "Nate Lockwood" <RNLockwoodREMOVE (AT) attglobal (DOT) net> wrote in message news:4400e10b$1 (AT) newsgroups (DOT) borland.com... Quote: I send a message to a already running application from one that has just been started. This works just fine AFAIK except when I try to get to the LParam. Eventually I expect to retrieve a char string. Your code is completely wrong for that. You cannot use COPYDATASTRUCT with any message other than the WM_COPYDATA message. And you cannot use the TApplication::OnMessage event to catch WM_COPYDATA messages, because the OnMessage event is only triggered for messages that are posted to the message queue, which WM_COPYDATA never is. Quote: I get this error: [C++ Error] Main.cpp(171): E2316 'WParam' is not a member of 'tagMSG' WParam (capital letters) is a VCL naming convension. tagMSG is a Win32 API structure, not a VCL structure. If you look at the definition of MSG in the Win32 API, you will see the following: typedef struct tagMSG { HWND hwnd; UINT message; WPARAM wParam; LPARAM lParam; DWORD time; POINT pt; } MSG; 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.