xaml - WPF - Accessing GDPicture object in a viewmodel -


i using mvvm , somehow should have access gdpicture object in viewmodel. here xaml

 <windowsformshost x:name="windowsformshost1"   height="991" width="1583">         <gdpicture:gdviewer x:name="m_gdviewer"                                                             backcolor="white" margin="5,5,5,5" displayquality="displayqualitybicubichq"                              documentalignment="documentalignmentmiddlecenter"                             documentposition="documentpositionmiddlecenter"                              mousebuttonformousemode="mousebuttonleft"                              mousewheelmode="mousewheelmodezoom" rectbordersize="1"  rectiseditable="true" zoommode="zoommodefittoviewer" zoomstep="25" />     </windowsformshost>

what kind of binding should use gdviewer object in view model? (i trying use m_gdviewer.displayfromfile(filename). m_gdviewer not accessible in viewmodel. can access xaml code behind).


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