STopping Code

[Ezpz]

...
 
If txtdis.text = "" then
msgbox("Sorry No Value Has Been Entered, please check and try again")
[SIZE=3]NEED CODE HERE[/SIZE] 
 
End IF
 
...

Well what i want to do is when a code running i want it to see if theres a value in the txtdis.text if not it wil show a msg above. well after wer it says need code i need a code to stop reading the action from the command button :/

if you get i thort it mite b stop but it didnt really work