Call this method to determine whether the specified path shares a common prefix with the current path.
CPathT< StringType > CommonPrefix(
   PCXSTR pszOther 
);
Parameters
- pszOther
 The path to compare to the current one.
Return Value
Returns the common prefix.
Remarks
A prefix is one of these types: "C:\\", ".", "..", "..\\". For more information, see PathCommonPrefix.
Requirements
Header: atlpath.h