Unable to interact with Windows file upload box with watir - watir

Question

I am writing a watir-webdriver test script to upload a file to app. My application uses kendo widgets, e.g. below
http://demos.telerik.com/kendo-ui/upload/index
I am able to interact with the windows dialog box when I debug the code, but when I execute it together, it times out as the windows dialog modal never seems to get the focus. Code below:
require 'win32ole'
sleep 1
wsh = WIN32OLE.new('Wscript.Shell')
## open the windows dialog modal.
#browser.div(:class => "k-button k-upload-button").click
### Code times out after the above click, it never executes the below steps as app looses focus, don't know how I can switch the focus to windows modal and execute below code.
#browser.windows.last.use do
sleep 2
wsh.AppActivate("File Upload")
sleep 2
wsh.SendKeys "{TAB}"
sleep 1
wsh.SendKeys("file path")
sleep 1
wsh.SendKeys "~"
end
Error :
Net::ReadTimeout (Net::ReadTimeout)

Answer 1

I was able to figure the solution for my problem by multi-threading .
def threaded
#filepath= upload_filepath ## reading from YAML
t1=Thread.new { select_files }
t2=Thread.new { file_upload(#filepath) }
t1.join
t2.join
end
def select_files_click_button
#browser.div(:class => "k-button k-upload-button").click
sleep 2
end
def file_upload(filepath)
#def file_upload
require 'win32ole'
sleep 3
wsh = WIN32OLE.new('Wscript.Shell')
sleep 2
wsh.AppActivate("File Upload")
sleep 4
wsh.SendKeys "{TAB}"
sleep 3
wsh.SendKeys("#{filepath}")
sleep 2
wsh.SendKeys "~"
sleep 2
#browser.windows.first.use
end