windows phone 8 - WP8: how to get back an IntPtr in c++ -

i'm developping plugin winphone 8 unity3d using c++ , directx. i'm right stuck because don't know how pass intptr type c# code c++ code. it's easier android or ios plugin since can data void*. in windows phone runtime component project it's not possible. read i've got use winrt types. i've search

here code samples:

in c#:

public delegate void wp8enabletexturedrawing(system.intptr texture); private wp8enabletexturedrawing wp8enabletexturedrawing;  public void setwp8texturedrawingfunc(wp8enabletexturedrawing func){      wp8enabletexturedrawing = func; }  //...  wp8enabletexturedrawing(targettexture.getnativetextureptr()); 

in c++ header file matches delegate way:

static void enabletexturedrawing(platform::object ^textureptr); 

but compiler throws error -> no overload 'wp8texturedrawing.texturedrawing.enabletexturedra wing(object)' matches delegate 'nativetexturedrawer.wp8enabletexturedrawing'

i hope has hands in me out.

thank

system.intptr ins't platform::object^. should use toint64() or toint32() intptr memory address getting , sending native code.