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Check datetime with regex

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Message       spol           Post subject: Check datetime with regexPosted: Tue 
Aug 19, 2008 11:46 am                        
Joined: Fri Sep 30, 2005 8:08 am
Posts: 31
Location: Bremen              Hi,

i like to check if a variable has datetime (yyyy-mm-dd h:i:s) format. 

Code:
Function regex_validate_datetime(value as string) As boolean
  ' check datetime with regex
  Dim rg as New RegEx
  Dim myMatch as RegExMatch
  
  
rg.SearchPattern="^([0-9]{4})\-([0-9]{2})\-([0-9]{2})\s\([0-9]{2})\:([0-9]{2})\:([0-9]{2})$"
  
  myMatch=rg.search(value)
  
  if myMatch <> Nil then
  return true
  else
  return false
  End if
End Function

msgbox str(regex_validate_datetime("2008-12-12 11:55:11"))



I always get an nil error when calling the function but i do not have the 
experiance to find the error. can anybody help me with that function?   
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