[julia-users] Missing Ref{T}

[Marcio Sales]

Hi, I'm using Julia 0.3.10 and trying to understand C bindings. I'm trying 
to use a OGR C function that changes the value of one of the parameters:

OGRErr OSRExportToWkt ( OGRSpatialReferenceH  *hSRS*, 

char **  *ppszReturn*  
) 
*ppszReturn *receives the results from this function. 

What do I have to pass to 
*ppszReturn *? I cant make a Ref{} object as it says Ref is not defined.

Thanks