delphi获取系统安装的默认浏览器

function TRATServer.GetDefaultBrowser:string;//获取默认浏览器
var
reg: TRegistry;
begin
reg := TRegistry.Create;
try
reg.RootKey := HKEY_CLASSES_ROOT;
reg.OpenKey(‘HTTP\shell\open\ddeexec\Application’,false);
result:=reg.ReadString(”);
reg.CloseKey;
finally
reg.Free;
end;
end;