how to modify the value type data which is parameter passed into function?

Question

If I want to modify the value type data ,which is passed into function as paramter,in function,what can I do?

I am intent to box the data in order to consider it as a ref type,but it is readonly.

Now I have to pass it out as a return value;

Answer 1

Could you please describe your question in more detail?

You can modify the value type data just as what you did in traditional c++ application.

For example,  You create a winrt lib and define follow function:

public bool func1(int* param1);

Then you can modify the value of param1 in func1. You can call func1 in your  C# metro style application:

func1(out param1);

Best Regards,

Han Xia

Answer 2

Readonly Variable or Object doesn't have set property..

So ,you can't change it's value.

It never be as reference type...

You can't change value type of object at runtime

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Answer 3

Hello,

Please describe your question detail.

Do you want to use reference to in C++/CX? if so, you can use % instead of & in native C++. Please check this document.
http://msdn.microsoft.com/en-us/library/windows/apps/br212455.aspx

Best regards,
Jesse

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Jesse Jiang [MSFT]
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