Text number conversion

[Len Morgan]

I'm talking to a microprocessor device using sockets and it returns a 
string like the following:

0,0x7BCC

The first item is a status code and the number after the comma is the 
hex value expressed as ASCII characters.  It will always be 4 digits.  I 
can't seem to convert this into a number (using baseConvert).  Is there 
some conversion command that I can't find?  I need a number because I'm 
after just one or two bits in that number and I can't use "bitAnd" 
unless I've got a number to work with.

len morgan