Hi guys, i have a problem, i was making a conversor (Binary, Decimal, Octal, Hexadecimal)
But i have some problems:
What can I do to prevent the user from inserting a wrong amount?
For example: if i put this value on the edit1: 123456 and i choose in the popupmenu 1 as binary then i choose on the popupmenu2 i want to convert it as hexadecimal, obviously it will be an error, because we know 123456 isn't a binary value, maybe for solve this error, we can put a msgbox saying *hey this isn't a binary value*, something like that. But i don't know how to code it.
This is an example: