LdrGetProcedureAddress - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers

#ifndef _NTLDR_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

NTSYSAPI
NTSTATUS
NTAPI
LdrGetProcedureAddress(
    _In_ PVOID DllHandle,
    _In_opt_ PANSI_STRING ProcedureName,
    _In_opt_ ULONG ProcedureNumber,
    _Out_ PVOID *ProcedureAddress
    );

#endif
#endif
View code on GitHub

FunctionName

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

FunctionName

See also