TitleChange Event を拾えばできるかと
https://msdn.microsoft.com/en-us/library/cc136553%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396
;
; IEコンポーネントを使ったブラウザ
;
#define DIID_DWebBrowserEvents2 "{34A715A0-6587-11D0-924A-0020AFC7AC4D}"
#define DISPID_TITLECHANGE 113
#define DISPID_NAVIGATECOMPLETE2 252
cls 1
sdim url,512
url="http://hsp.tv/"
objsize 600,24
pos 0,2:mes "URL:"
pos 0,26:mes "WEB Browser Sample"
pos 40,0:input url
objsize 120,24
pos 520,24:button "移動",*wow
pos 400,24:button "進む",*go_f
pos 280,24:button "戻る",*go_b
pos 0,48
axobj ie, "Shell.Explorer.2",640,480-48
num=stat
comevent ie_event, ie, "{34A715A0-6587-11D0-924A-0020AFC7AC4D}",*event ; DIID_DWebBrowserEvents2
ie->"Navigate" url
*main
stop
*event
; COMイベント処理
dispid = comevdisp(ie_event)
if dispid = DISPID_NAVIGATECOMPLETE2 : gosub *OnNavigateComplete2
if dispid = DISPID_TITLECHANGE : gosub *OnTitleChange
return
*OnNavigateComplete2
name = ie("LocationURL")
objprm 0,name
pDoc = ie("Document")
name = pDoc("Title")
title name
delcom pDoc
return
*OnTitleChange
comevarg name, ie_event, 0
title name
return
*wow
ie->"Navigate" url
goto *main
*go_f
ie->"GoForward"
goto *main
*go_b
ie->"GoBack"
goto *main