Identification of string classes

Public Function StringIsAlpha(s As String) As Boolean

Is the string Alphabetic (A..Z, a..z) ?

Public Function StringIsAlphaNumeric(s As String) As Boolean

Is the string AlphaNumeric (A..Z, a..z, 0..9) ?

Public Function StringIsCurrency(s As String) As Boolean

Is the string a valid Currency (ie. CCur(s) will succeed) ?

Public Function StringIsDecimal(s As String) As Boolean

Is the string a valid Decimal (ie. CDec(s) will succeed) ?

Public Function StringIsDouble(s As String) As Boolean

Is the string a valid Double (ie. CDbl(s) will succeed) ?

Public Function StringIsInteger(s As String) As Boolean

Is the string a valid Integer (ie. CInt(s) will succeed) ?

Public Function StringIsLong(s As String) As Boolean

Is the string a valid Long (ie. CLng(s) will succeed) ?

Public Function StringIsSingle(s As String) As Boolean

Is the string a valid Single (ie. CSng(s) will succeed) ?

Public Function StringIsValidGUID(s As String) As Boolean

Is the string a valid GUID ?