Re: progress while binding libxl

[oyster]

the first question, I translated 
    
    
    typedef struct tagBookHandle * BookHandle;
    

to 
    
    
    type
        tagBookHandle* {.final, incompleteStruct, importc: "tagBookHandle".} = 
object
        BookHandle* {.importc: "BookHandle".} = ptr tagBookHandle
    
    

Am I right?

But why I get 
    
    
    unknown type name 'tagBookHandle'
    

when I compile the following simple code 
    
    
    type
        tagBookHandle* {.final, incompleteStruct, importc: "tagBookHandle".} = 
object
        BookHandle* {.importc: "BookHandle".} = ptr tagBookHandle
    
    const
        xldll* = "libxl.dll"
    
    
    # BookHandle xlCreateBookCW(void);
    proc xlCreateBookCW*(): BookHandle {.cdecl, importc: "xlCreateBookCW", 
dynlib: xldll.}