How to resolve this in NAV 2016?

Hi All,

i have an issue in nav 2016 see this below image 

this is the image from NAv 2009 R2 Classic in that i have a function "Get Order" in this inputWindow Code is

InputWindow.OPEN(Text001);
InputWindow.INPUT(1,"Document Type");
InputWindow.INPUT(2,SourceNo);
InputWindow.UPDATE(1,"Document Type");
InputWindow.UPDATE(2,SourceNo);

i have to done same requirement in Nav 2016 here i referred links

http://saurav-nav.blogspot.in/2014/09/discontinued-component-nav-2013-later.html

by reffer this link i can enter only source no. only how can i show both Document type and Document No. 

please suggest me.

Thank you,

Ramesh.