Calculated Member MDX Expression Syntax

I am trying to build a calculated member based on logic that depends on values for a given dimension attribute.  How would I go about building the expression?  For example if a given attribute value is 'A' then I want to count an existing measure towards this calculated member.  Any sample code would be helpful.
anguptaAsked:
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Reza RadConsultant, TrainerCommented:
you can use case expression for conditional expressions, look at here for example:
http://msdn.microsoft.com/en-us/library/ms722762%28v=VS.85%29.aspx

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Reza RadConsultant, TrainerCommented:
all types of mdx conditional expressions are here:
http://msdn.microsoft.com/en-us/library/ms711272%28VS.85%29.aspx
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anguptaAuthor Commented:
These examples use measures only,  I need to use attribute values in the case statement.  I tried doing this before however I am unable to read in the values the attributes.
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Reza RadConsultant, TrainerCommented:
you can get values as below:
http://www.experts-exchange.com/Database/OLAP/Q_23057356.html

let me know if i am wrong in understanding your problem
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Megan BrooksSQL Server ConsultantCommented:
Show us something you tried that didn't work, or elaborate on what you are trying to do. I ran a quick test with a query in this form and it worked just fine:

with member Measures.chooseone as case [Dim].[Hier] when [Dim].[Hier].&[1] then [Measures].[M1] when [Dim].[Hier].&[2] then [Measures].[M2] when [Dim].[Hier].&[3] then [Measures].[M3] end
select {measures.chooseone} on columns, [Dim].[Hier2].[Hier2] on rows from [Cube]
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