SetGlobalOffline

Use SetGlobalOffline to switch between 'Work Online' and 'Work Offline'. 

SetGlobalOffline(TRUE) = Work Offline;

SetglobalOffline(FALSE)= Work Online;

Use IsGlobalOffline to detect if your webbrowser is in global offline mode. The following lines of code adds a menu item for switching between 'Work Offline' and 'Work Online':

procedure TForm1.Offline1Click(Sender: TObject);
var
State : Boolean;
begin

state:=IsGlobalOffline;
EmbeddedWb1.SetGlobalOffline(not State);
If State then Offline1.Caption:='Work Offline' else 
Offline1.Caption:='Work Online';
end;

SetGlobalOffline works exactly as 'Work Offline/Online'  in IE4/IE5.

This function is based on source-code posted by Adam Stiles in the delphi-webbrowser newsgroup (Message 426).

Links:

Offline Browsing