pinvoke - How to convert out/ref extern parameters to F# -


i've got c# extern declaration goes this:

    [dllimport("something.dll")]     public static extern returncode getparent(intptr inref, out intptr outparentref);

how translate f#?

you can try code below. don't know returncode is, code below expects integer. more complex type, you'll need use [<struct>] attribute in answer referenced a-dubb.

type returncode = int  [<system.runtime.interopservices.dllimport("something.dll")>] extern returncode getparent(system.intptr inref, system.intptr& outparentref);

to call function, you'd write this:

let mutable v = nativeint 10 let n = getparent(nativeint 0, &v)

btw: post sample c code implements function in something.dll? if yes, try running solution before sending answer...


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