c# - VSTO splash screen or progress bar -


i have project i'm doing 

microsoft vsto (office 2013 excel)

i have things make calls take maybe 10 seconds come back.

ideally display progress bar or status... after lot of searching found article titled:

how create splash screen window vsto applications? http://www.datazx.cn/fv7p5a/xw/oa2v/2q7xs6/mcccjfti-988m-f8r8-8d44-bstb4rfsi4xm23rsdfd.html

so started creating code in form, realize need call within methods , attach events etc...

the article says 

"display modal form on background thread"   best way this?

i find easier use modal less form on main thread , far haven't seen problem modal less approach. code below

var splashwindow = new splashwindow(); splashwindow.show(); splashwindow.setmessage("starting please wait..."); dosomework(splashwindow); splashwindow.close();

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