Undocumented functions of NTDLL

NTSYSAPI 
NTSTATUS
NTAPI
LdrGetProcedureAddress(

  IN HMODULE              ModuleHandle,
  IN PANSI_STRING         FunctionName OPTIONAL,
  IN WORD                 Oridinal OPTIONAL,
  OUT PVOID               *FunctionAddress );

FunctionName
Is optional, but you must declare one of FunctionName or Oridinal. In Microsoft concept, you should use both parameters,
for faster function implementation. But there's a bug in link.exe, and all oridinals in PE executables are wrong...