One general advise concerning sitetros :
How about another button (on Windowed/Screen popup screen)
or another dialog box after escaping the intro - that asks the
user if he wanted to visit the website the intro is advertising ?
Using some simple WinAPI commands opens standard browser
with given URL AFAIK (cannot remember exact WinAPI function -
was it
ShellExecute or something like this

).
EDIT:
Just looked it up - here is the code if someone is interested :
LONG r = ShellExecute(NULL, "open", "http://www.microsoft.com", NULL, NULL, SW_SHOWNORMAL);Should work with FreeBasic, too - since you have access to the
WinApi, haven't you ?