How can I get an array of datas from COM server?

[magicast]

hi~ Thanks for reading my problem. :) I'm not good at english. I hope for u to understand me. I make a DCOM service with Visual C++ 6.0. I want that COM Server returns an array of datas, ex 10 number of integers. I wrote idl like this. [id(2), helpstring("method B")] HRESULT B([out] long* plCount, [out, size_is(, *plCount)] long** pplData); and wrote implementation as follows, STDMETHODIMP CMyB::B(long *plCount, long **pplData) { *plCount = 10; *pplData = static_cast(::CoTaskMemAlloc(sizeof(long) * *plCount)); for (int nIndex = 0; nIndex < *plCount; nIndex++) *(*pplData + nIndex) = 5000 + nIndex; return S_OK; } when I call this method in client, I expect the result like {5000, 5001, 5002, 5003...}. but I get 5000 and gabarge. {5000, ....invalid data...} I debuged server program and I can identifed all the elements are set correctly. but client has only 1 data. Why this occur? How can I solve this? and... now, I treat 'long' type data. but, I want to treat custom type(struct etc...) in the future, also. I hope for u save me. :) goodday~

[safepage]

I would use a SAFEARRAY. In VC++6.0 you will need to the SAFEARRAY Win32 calls yourself. This is made easier in VC++7.0 as you can use the class CComSafeArray wrapper. One tip, if your using Automation clients, make sure you specify the data type inside the SAFEARRAY in your MIDL file e.g. for a long... [(id(1)] HRESULT MyMethod([out]SAFEARRAY(long)* sa) Sample code can be found at http://support.microsoft.com/default.aspx?scid=kb;EN-US;q207931 ----- Andrew Farrell Liquid Technologies http://www.code-generator.com

[soptest]

You must create proxy/stub DLL for custom data marshaling. Go to your Obj path and find YourObj.mk, build this make file (you can "Insert Project into Workspace" rename *.mk to *.mak and add this mkae file to Workspace) and after you register your com obj register produced proxy/stub DLL. P.S. on build machine you must register proxy/stub file every time you rebuild your COM object project. soptest

[soptest]

He wants to use custom types. But safearray is automation type for arrays. soptest

[magicast]

Thank you. You flew my trouble. now I'm happy ;) goodday~