wpf - New Thread for Loading animated Gif -

i have read countless pages on how can achieved none seem working me.. wonder if because using wpf??

i have image control on wpf page holds animated gif. initial visibility property set hidden - idea being become visible when user logs in , disappears once login has been achieved.

so, first thought make image visible on button click - carry out grunt work hide again. image never gets displayed until after processing has completed - rendering idea useless one.

so, after bit of digging seems people have achieved processing new thread , using background worker object. have tried continually error:

the calling thread cannot access object because different thread owns it.

my code follows:

global variable thread object:

friend g_thloading thread 

on button click login on have:

private sub btnloginok_click(sender object, e routedeventargs) handles btnloginok.click      g_thloading = new thread(addressof loadingimage)     g_thloading.isbackground = true     g_thloading.start()      try         ... heavy processing takes while ...      catch liex unauthorizedaccessexception         txbresults.text = liex.message()      catch ex exception         msgbox(ex.message)     end try      g_thloading.abort()  end sub 

then method making image visible:

public sub loadingimage()      imgloading.visibility = visibility.visible  end sub 

i have read posts error message stating freeze object (cannot see how works) , @ using dispatcher - little lost on me though every example have tried not work.