"Hoe gaat het?"
This translates literally as "How goes it?".
Other ways to say it, depending on the context, include:
* "Hoe is het?" (How is it?)
* "Hoe gaat het met jou?" (How is it with you?)
* "Hoe maak je het?" (How are you making it?) - This is a slightly more informal and friendly way to ask.
Important note: Flemish is a dialect of Dutch, and the differences between Flemish and standard Dutch are relatively minor. So, all of these phrases would also be understood in standard Dutch.