http://www.autoitscript.com/autoit3/docs/functions/ControlSend.htm says
ControlSend() works in a similar way to Send() but it can send key strokes directly to a window/control, rather than just to the active window.

So its basically like any function that takes a hwnd like many of the Win32::GuiTest functions that do 

MouseClick($window [,$parent] [,$x_offset] [,$y_offset] [,$button] [,$
+delay])
$text = WMGetText($hwnd)
$set = WMSetText($hwnd,text)
SetFocus($hWnd)
PostMessage($hwnd,msg,wParam,lParam) 
SendMessage(hWnd,Msg,wParam,lParam)

[download]

And if you load Win32::GUI you can access to a whole lot more functions Re: How to get a window's menu as a Win32::GUI::Menu object?

If you want to automate anything on win32 you have to absorb the following knowledge . It mostly consists of learing the ole/excel/powerpoint... object model, and using Win32::OLE to call it or sending messages using guitest. OLE is essentially a fancy/standardised way of sending messages. Its very much like web-scraping, you have to know HTTP/HTML DOM .... the rest is just legwork

In reply to Re^4: How to continue the execution of a perl script if the user session gets locked while running it. (hwnd) by Anonymous Monk
in thread How to continue the execution of a perl script if the user session gets locked while running it. by pradeep,krishna

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