Problems with NtOpenSymbolicLinkObject...   

I am trying to get the directory that a "directory" symbolic link "points to" 
in Vista.  (I actually need this in my application!)  To do this I have to 
call the "NtQuerySymbolicLinkObject" Windows API function, but prior to 
calling the "NtQuerySymbolicLinkObject" routine, I have to call 
"NtOpenSymbolicLinkObject" to "open" the symbolic link.  (I have to call 
"LoadLibrary" and "GetProcAddress" several times to get the actual run-time 
addresses of these routines because they are not "exported" in the C++ 
run-time libraries), but that part is working fine!).  Anyway, the result of 
calling "NtOpenSymbolicLinkObject" is an "Invalid Parameter Information" 
error at line 42 in function "wcscat_s" located in file "tcscat_s.inl", where 
the expression that caused the error is "(L"Buffer is too small" && 0)" 
(???).   (I have fairly complete error catching and reporting in the 
program.)  To supply more (needed) information, the parameters to the 
"NtOpenSymbolicLinkObject" routine are as follows:

ObjectAttributes.Length                                  = 24
ObjectAttributes.RootDirectory                         = 0x00000000
ObjectAttributes.ObjectName                           = 0x0019a970
ObjectAttributes.ObjectName -> Buffer              = ""
ObjectAttributes.ObjectName -> MaximumLength = 2048
ObjectAttributes.ObjectName -> Length             = 0
ObjectAttributes.Attributes                              = 0x80000200 
(OBJ_KERNEL_HANDLE | GENERIC_READ)
ObjectAttributes.SecurityDescriptor                   = 0x00000000
ObjectAttributes.SecurityQualityOfService          = 0x00000000

From what I can tell from reading the (limited!) documentation, these 
parameters are all correct, and I have tried MANY (!) variations, all with no 
success.  Bottom line:  HELP!!!  I've been fooling with this for two whole 
days with no results!

date: Thu, 24 Jul 2008 20:15:02 -0700   author:   DanTheMostlyRetiredMan