COM object for testing purposes

- I need a simple COM object for learning purposes, preferably written in VB.NET, C# or C++ (could use ATL). - The object would need to implement one of these two methods: TimesTwo([in] DOUBLE* doubleArray -OR- FillBuffer([in] unsigned char * MyBuffer) ## Deliverables - I require a project for MSVS 2005 or 2008. - I require one of the two following method implementations in the COM object, what they should do is: a. TimesTwo([in] DOUBLE* doubleArray) Should take a double array of any size and multiply all elements by two. -OR- b. FillBuffer([in] unsigned char * MyBuffer) Should fill the passed buffer with a constant string that can be set in the code. The IDL interface should define the parameters as [in] only, but an application such as VB6 or VBA should be able to pass an array and get the modified array back. I have seen this type of objects before and I know that it works.