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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'>Hi, Paul,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'>it’s documented at http://ironpython.net/documentation/dotnet/dotnet.html#ref-and-out-parameters. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'>The out parameter will be mapped as an additional return value.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'>So if myComObj.foo returns void, a simple call like<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'>blah = myComObj.Foo()<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'>should do the trick.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>Grüße,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>Markus<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> users-bounces@lists.ironpython.com [mailto:users-bounces@lists.ironpython.com] <b>Im Auftrag von </b>Tilley, Paul<br><b>Gesendet:</b> Mittwoch, 30. März 2011 01:10<br><b>An:</b> users@lists.ironpython.com<br><b>Betreff:</b> [IronPython] Newbie InterOp-related question<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>Hi,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I’ve just started using IronPython but have hit a bit of a roadblock. This may also be caused by inadequate .Net knowledge.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>In C# I can call a COM object (where the COM method is going to fill in the parameter) like so:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>object blah;<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>myComObj.Foo(out blah);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>If for example the COM method returns an array of strings ( with the parameter VARIANT* in COM method signature) then in C# I get an object[] back which with appropriate massaging I can process.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>How would I declare the variable in Python if I want access the returned contents correctly? Knowing I was to get an array back I naively tried:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>blah = []<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>myComObj.Foo(blah)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The call is made correctly – I can see the COM object is filling out the return parameter OK but blah remains an empty list.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Any insights on what I should be doing more than welcome,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Paul<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></div></body></html>