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URGENT: ATL component to convert string

I want to make an ATL component in Visual C++ (No MFC).
I want to make a function that converts a string, example:




HRESULT ConvertString( string  strSomething);
strSomething is an input / output parameter!!

2 questions:

- What type can I use for strSomething?
- What actions do I have to do to add the method to my component and export it?
(should I add it to the interface AND to the class or is there some kind of wizard? )

Thanks in advance!!!
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MelissaC
Asked:
MelissaC
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1 Solution
 
migelCommented:
Hi!
1. COM interfaces use BSTR strings (UNICODE wide char strings),

2. You MUST define new interface (let it be : IStringConverter)
3. To do this you just in the ATL project
right click on the project name in the workspace class tab.
and choose New ATL object.
ATL "wizard" will apear - here you must set name for your interface and coClass.
4. after wizard finish you will see your new interface in the class tab
5. RightClick on the interface and choose Add method
6 in the appeared dialog type method name :
ConvertString
and its parameters:
[in, out, retval] BSTR bstrString;
click ok.
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tdubroffCommented:
I don't think you want retval in the attribute list.  If you do use retval in the attribute list, then I think your VB code would look like this:

' assume obj is an IStringConverter
dim str as String
str = "abl;kjadsf"
str = obj.ConvertString(str)  ' this line doesn't quite make sense

If you get rid of the retval, then the VB code would be:

dim str as String
str = "abl;kjadsf"
obj.ConvertString(str)
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migelCommented:
Hey!
anybody here?
none???
so I lock this Q.
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tdubroffCommented:
Your lock is not an answer!  Kindly remove it.
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migelCommented:
But My previous comment is ansver.
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