Web Browser HELP!!!

[XxLithiumxX]

Me and one other person are making a web browser. i have made ver 1.0 but it has a major bug i need to fix. i cant find a way to make this work. can someone please help.
Problam 1
When I press back, and have no more history to go through it pops up an error message and closes the programm i just want it to do nothing and stay on that pager
the code i have used for this is

 webbrowser1.GoBack 

I sure there is another line of code to stop this but i tried and cant find it

problam 2
The same but with forward

 webbrowser1.goforward 

i am so sure there is a simple way of finding this just cant seem to work it out
Any help will be much appriciated thanks

[bimalkumar]

Me and one other person are making a web browser. i have made ver 1.0 but it has a major bug i need to fix. i cant find a way to make this work. can someone please help.
Problam 1
When I press back, and have no more history to go through it pops up an error message and closes the programm i just want it to do nothing and stay on that pager
the code i have used for this is

 webbrowser1.GoBack 

I sure there is another line of code to stop this but i tried and cant find it

problam 2
The same but with forward

 webbrowser1.goforward 

i am so sure there is a simple way of finding this just cant seem to work it out
Any help will be much appriciated thanks

hi,
have u tryed this "on error goto re"
re:
//specify the same page where actally it was

if u r not sattisfied pls dnt curse me