COM question

Posted on 2004-04-21
Medium Priority
Last Modified: 2013-11-25
I am writing a COM component. I declared my method as following:
HRESULT __stdcall PACK([in]TCHAR *src, [in]int srclen, [out, retval]TCHAR *retval);
After compiling and registered the COM, I checked the component using OLE/COM object viewer, and I saw the following:
HRESULT PACK([in] short* src, [in] int srclen, [out, retval] short* retval);
Why is my TCHAR being converted to "short", but not char or wchar?? I think this messed up my string manipulation in the code. I want the src and retval to be "char" just like in regular C++.
Question by:kc2592
  • 2

Author Comment

ID: 10895481
Please Help!!

Author Comment

ID: 10934497
Please HELP!!

Accepted Solution

_ys_ earned 400 total points
ID: 11067458
TCHAR [and even char] are not valid COM types. Please use BSTR for string variables instead.

You will have to use SysAllocString and SysFreeString to manage their memory - (oleauto.h)

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