Internet Explorer,IEFrame,
AOL,AOL,
Netscape,MozillaWindowClass,NS_AE_WindowClass
MSN Messenger,IMWindowClass,MSNMSBLClass
MSN Browser,MSN6 
Opera,OpWindow
Yahoo! Messenger,YahooBuddyMain,IMClass
AIM,AIM_IMessage,#32770
Mozilla/Firefox,MozillaWindowClass,MozillaUIWindowClass
Windows Messenger, Windows Messenger,IMWindowClass
Avant Browser,TfrmAvantBrowser
Netcaptor,TfrmMain