BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  DLL registration          BorlandTalk.com Forum Index -> C++ Builder (ActiveX) View previous topic :: View next topic   Author Message Danid Guest Posted: Wed Jul 27, 2005 3:49 pm    Post subject: DLL registration Please help, I want to create a dll to use it is web page using ASP. In the past I created an OCX component and registered it (regsvr32.exe) and then if I search the register I found the component with its clsid. In the case of the DLL, I register it by the same way as I did for the ocx, but then If I cannot find it in the register if I search for it. Is the registration of a DLL different from OCX? Shoud I add more things to the DLL to be registered correctly? Thanks in advance, Back to top Remy Lebeau (TeamB) Guest Posted: Wed Jul 27, 2005 4:44 pm    Post subject: Re: DLL registration "Danid" <danid (AT) yahoo (DOT) com> wrote Quote: In the case of the DLL, I register it by the same way as I did for the ocx, but then If I cannot find it in the register if I search for it. Is the registration of a DLL different from OCX? No. Does the DLL contain ActiveX/Com objects to begin with? Gambit Back to top danid Guest Posted: Wed Jul 27, 2005 5:55 pm    Post subject: Re: DLL registration Here are the steps I make to create a DLL: File->New->ActiveX->ActiveX Library I add my own functions and the compile it. I call it in my C++ app by LoadLibrary() and it works. But I have no experience with using it in a web page. I know that I have to register it first. I use BCB6 Thanks "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote: Quote: "Danid" <danid (AT) yahoo (DOT) com> wrote in message news:42e7ad0a$1 (AT) newsgroups (DOT) borland.com... In the case of the DLL, I register it by the same way as I did for the ocx, but then If I cannot find it in the register if I search for it. Is the registration of a DLL different from OCX? No. Does the DLL contain ActiveX/Com objects to begin with? Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Wed Jul 27, 2005 7:18 pm    Post subject: Re: DLL registration "danid" <danid (AT) yahoo (DOT) com> wrote Quote: File->New->ActiveX->ActiveX Library That creates a DLL with no ActiveX/COM objects added to it. You have to do that separately. Without any ActiveX/COM objects, registering the DLL is useless as there is nothing available to register. In order to use the DLL in an ASP script, you must add ActiveX/COM objects to the DLL as well, as that is what the ASP code will actually be working with. Gambit Back to top danid Guest Posted: Thu Jul 28, 2005 8:35 am    Post subject: Re: DLL registration Thanks Gambit, that's a step forward. Now I add a COM Object to my project then I register it. I can see the name of the added COM in the register. But when I try to call it in my ASP page (Server.CreateObject) I get the following error: "No such Interface supported" What I am doing wrong again? Thanks, "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote: Quote: "danid" <danid (AT) yahoo (DOT) com> wrote in message news:42e7ca8a$1 (AT) newsgroups (DOT) borland.com... File->New->ActiveX->ActiveX Library That creates a DLL with no ActiveX/COM objects added to it. You have to do that separately. Without any ActiveX/COM objects, registering the DLL is useless as there is nothing available to register. In order to use the DLL in an ASP script, you must add ActiveX/COM objects to the DLL as well, as that is what the ASP code will actually be working with. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Thu Jul 28, 2005 4:49 pm    Post subject: Re: DLL registration "danid" <danid (AT) yahoo (DOT) com> wrote Quote: Now I add a COM Object to my project then I register it. I can see the name of the added COM in the register. But when I try to call it in my ASP page (Server.CreateObject) I get the following error: "No such Interface supported" I cannot answer that because you did not explain EXACTLY what you did. Please explain, step by step, everything that you did. Gambit Back to top danid Guest Posted: Thu Jul 28, 2005 7:54 pm    Post subject: Re: DLL registration I created an ActiveX project: File->New->Other->ActiveX->ActiveX Library I added a new COM Object File->New->Other->ActiveX->COM Object coClassName: coTestClass Threading Model: Apartment Implemented Interface: IcoTestClass in the coTestClassImpl.h I added: int doAdd(int i1, int i2); in the coTestClassImpl.cpp I added: int TcoTestClassImpl :: doAdd(int i1, int i2) { return i1 + i2; } I saved, compiled and got a DLLTEST.dll I then run regsvr32 DLLTEST.dll In the register I have DLLTest.coTestClass that I want to use in ASP SET testObj = Server.CreateObject("DLLTest.coTestClass") In this line I get the error: "No such interface supported" Thanks, "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote: Quote: "danid" <danid (AT) yahoo (DOT) com> wrote in message news:42e898d9$1 (AT) newsgroups (DOT) borland.com... Now I add a COM Object to my project then I register it. I can see the name of the added COM in the register. But when I try to call it in my ASP page (Server.CreateObject) I get the following error: "No such Interface supported" I cannot answer that because you did not explain EXACTLY what you did. Please explain, step by step, everything that you did. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Thu Jul 28, 2005 8:25 pm    Post subject: Re: DLL registration "danid" <danid (AT) yahoo (DOT) com> wrote Quote: in the coTestClassImpl.h I added: int doAdd(int i1, int i2); Did you add that method to IcoTestClass by using the Type Library Editor? It does not look like you did. You must use the Type Library Editor to make any changes/additions to the COM object and CoClass. Quote: In the register I have DLLTest.coTestClass that I want to use in ASP SET testObj = Server.CreateObject("DLLTest.coTestClass") That is likely not the correct ProgID string to use. You need to use the exact same string that appears in the DECLARE_PROGID macro inside of coTestClassImpl.h. In the Type Library Editor, did you name your COM object's module to be "DllTest"? If your COM object set up as the default interface for the CoClass? Gambit Back to top danid Guest Posted: Thu Jul 28, 2005 9:23 pm    Post subject: Re: DLL registration Thanks for taking time to look at my problem. I followed your last instructions but I still get the same error. Can you please show me step by step how I can get this to work? Thanks, "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote: Quote: "danid" <danid (AT) yahoo (DOT) com> wrote in message news:42e937e6$1 (AT) newsgroups (DOT) borland.com... in the coTestClassImpl.h I added: int doAdd(int i1, int i2); Did you add that method to IcoTestClass by using the Type Library Editor? It does not look like you did. You must use the Type Library Editor to make any changes/additions to the COM object and CoClass. In the register I have DLLTest.coTestClass that I want to use in ASP SET testObj = Server.CreateObject("DLLTest.coTestClass") That is likely not the correct ProgID string to use. You need to use the exact same string that appears in the DECLARE_PROGID macro inside of coTestClassImpl.h. In the Type Library Editor, did you name your COM object's module to be "DllTest"? If your COM object set up as the default interface for the CoClass? Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Thu Jul 28, 2005 10:29 pm    Post subject: Re: DLL registration "danid" <danid (AT) yahoo (DOT) com> wrote Quote: I followed your last instructions but I still get the same error. Then you need to post your actual files, because you apparently still have not set them up correctly. Quote: Can you please show me step by step how I can get this to work? You already know step by step what to do now. Gambit Back to top Danid Guest Posted: Sat Jul 30, 2005 4:44 pm    Post subject: Re: DLL registration I posted my code in borland.public.attachements: DLL registration Thanks "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote: Quote: "danid" <danid (AT) yahoo (DOT) com> wrote in message news:42e94cee$1 (AT) newsgroups (DOT) borland.com... I followed your last instructions but I still get the same error. Then you need to post your actual files, because you apparently still have not set them up correctly. Can you please show me step by step how I can get this to work? You already know step by step what to do now. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Sat Jul 30, 2005 7:12 pm    Post subject: Re: DLL registration "Danid" <danid (AT) yahoo (DOT) com> wrote Quote: I posted my code in borland.public.attachements: DLL registration You need to check your computer's clock. The message was dated January 1. I see several things wrong with your project: 1) in the Project Options, under the "Linker" tab, you have the "Use dynamic RTL" option enabled, and under the "Packages" tab you have the "Build with runtime packages" option enabled. With those two options enabled, your DLL is *not* self-contained. It has dependancies on several external libraries that would have to be distributed along with the DLL in order for it to operate correctly. You should disable both of those options so that the DLL does not have those dependancies. 2) in the Project Options, under the "ATL" tab, you should change the "Instancing" option to "Single Use". 3) your doCount() method is not implemented properly. You are using the method's return value to return the sum of the provided parameters. That is not the correct way to return a value from a COM control. All COM methods must return an HRESULT indicating whether the operation was successful or not. The actual return value is handled via an additional method parameter that is marked as [out, retval]. For example: --- ActiveX10_TLB.h --- interface ICoActiveX10 : public IUnknown { public: virtual HRESULT STDMETHODCALLTYPE doCount(int i1/*[in]*/, int i2/*[in]*/, int* result/*[out,retval]*/) = 0; // [1] }; --- CoActiveX10Impl.h --- public: STDMETHOD(doCount(int i1, int i2, int* result)); --- CoActiveX10Impl.cpp --- STDMETHODIMP TCoActiveX10Impl::doCount(int i1, int i2, int* result) { *result = i1 + i2; return S_OK; } Gambit Back to top danid Guest Posted: Sun Jul 31, 2005 3:35 pm    Post subject: Re: DLL registration Thanks again. It worked, finally :) I made an ocx component with a method doCount(int i1, int i2, int *result), I tested it in ASP and I got the result set conn= Server.CreateObject("OCXActiveProj1.OCXActive") dim x, y, z x = 3 y = 4 Response.write conn.doCount(cint(x), cint(y)) Now I want to call it using Borland C++: typedef int WINAPI (*FuncPtr)(int, int, int*); void __fastcall TForm1::Button3Click(TObject *Sender) { HMODULE dll_handle = LoadLibrary("D:\Dev\test\OCX1\OCXActiveProj1.ocx"); if (!dll_handle) ShowMessage("Error: could not load OCXActiveProj1.ocxn"); else { FuncPtr doCount= (FuncPtr) GetProcAddress(dll_handle, "doCount"); int i1 = 1; int i2 = 3; int *result; if (!doCount) ShowMessage("Error: could not find address of function doCountn"); else ShowMessage(AnsiString(doCount(i1, i2, result)); FreeLibrary(dll_handle); } } I get the error: Error: could not find address of function doCount Another question: Is it possible to use TADOQuery in an OCX component and if yes, how? let say I want to make a method that counts the records in a table ADO->RecordCount(); Danid "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote: Quote: "danid" <danid (AT) yahoo (DOT) com> wrote in message news:42e937e6$1 (AT) newsgroups (DOT) borland.com... in the coTestClassImpl.h I added: int doAdd(int i1, int i2); Did you add that method to IcoTestClass by using the Type Library Editor? It does not look like you did. You must use the Type Library Editor to make any changes/additions to the COM object and CoClass. In the register I have DLLTest.coTestClass that I want to use in ASP SET testObj = Server.CreateObject("DLLTest.coTestClass") That is likely not the correct ProgID string to use. You need to use the exact same string that appears in the DECLARE_PROGID macro inside of coTestClassImpl.h. In the Type Library Editor, did you name your COM object's module to be "DllTest"? If your COM object set up as the default interface for the CoClass? Gambit Back to top danid Guest Posted: Sun Jul 31, 2005 3:36 pm    Post subject: Re: DLL registration Thanks again. It worked, finally :) I made an ocx component with a method doCount(int i1, int i2, int *result), I tested it in ASP and I got the result set conn= Server.CreateObject("OCXActiveProj1.OCXActive") dim x, y, z x = 3 y = 4 Response.write conn.doCount(cint(x), cint(y)) Now I want to call it using Borland C++: typedef int WINAPI (*FuncPtr)(int, int, int*); void __fastcall TForm1::Button3Click(TObject *Sender) { HMODULE dll_handle = LoadLibrary("D:\Dev\test\OCX1\OCXActiveProj1.ocx"); if (!dll_handle) ShowMessage("Error: could not load OCXActiveProj1.ocxn"); else { FuncPtr doCount= (FuncPtr) GetProcAddress(dll_handle, "doCount"); int i1 = 1; int i2 = 3; int *result; if (!doCount) ShowMessage("Error: could not find address of function doCountn"); else ShowMessage(AnsiString(doCount(i1, i2, result)); FreeLibrary(dll_handle); } } I get the error: Error: could not find address of function doCount Another question: Is it possible to use TADOQuery in an OCX component and if yes, how? let say I want to make a method that counts the records in a table ADO->RecordCount(); Danid Back to top Remy Lebeau (TeamB) Guest Posted: Mon Aug 01, 2005 5:32 pm    Post subject: Re: DLL registration "danid" <danid (AT) yahoo (DOT) com> wrote Quote: I made an ocx component You do not need to use an OCX in this situation. A DLL works just fine. You should use OCX for visual components, not non-visual ones. Quote: Now I want to call it using Borland C++: snip You are taking the completely wrong approach to do that. You need to add the DLL's TLB.cpp into your project and then creating an instance of the TLB's CoClass object, ie. #include "OCXActiveProj1_TLB.h" void __fastcall TForm1::Button3Click(TObject *Sender) { // names may vary depending on your actual implementation... TCOMIOCXActive OCX = CoOCXActiveProv::Create(); if( OCX ) { int i1 = 1; int i2 = 3; int *result; HRESULT hRes = OCX->doCount(i1, i2, &result); if( SUCCEEDED(hRes) ) ShowMessage(result); else ShowMessage("Error: doCount() failed, HRESULT = " + AnsiString(hRes)); } else ShowMessage("Error: could not load OCXActive"); } Quote: I get the error: Error: could not find address of function doCount That is correct, because doCount() is not an exported function to begin with. You cannot use GetProcAddress() to retreive a pointer to it. It is a method in a class, which itself is not exported either. The only way to gain access to the objects of a COM DLL/OCX is via the DLL's exported DllGetClassObject() function, which returns an IClassFactory object. IClassFactory has a CreateInstance() method for creating instances of the DLL's COM objects. In the above code, Create() calls CoCreateInstance(), which handles calling into IClassFactory for you. 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