I am new to programming and am playing with VB.net.

I have a string:

Mary has a little lamb.

I want to extract the vowels only in order and display in a label as follows:

aaaiea

I am working towards a list of constanants as well as follows:
mryhslttllmb

but want to start with the first part.

I have googled and found no such problems.

Can anyone please help.