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From: Ivan Novgorodtsev <ivan.novgorodtsev@itti.com.pl>
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Date: Fri, 1 Feb 2019 13:41:17 +0100
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Subject: LocateProtocol - gEfiTcp4ServiceBindingProtocolGuid
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Hi,
I'm having trouble with sending a tcp packet from UEFI Application. I'm 
using code from this github: 
https://github.com/YunWang/uefi-programming-guider/tree/master/book/Network

I attached two screenshot were I suppose something went wrong. In first 
one, at lines 91-94  LocateProtocol triggers return. Second screenshot 
shows the error. Settings:

*BootCheck.inf*

[Packages]
   MdePkg/MdePkg.dec
   MdeModulePkg/MdeModulePkg.dec
   ShellPkg/ShellPkg.dec

[LibraryClasses]
   UefiApplicationEntryPoint
   UefiLib
   UefiBootServicesTableLib
   #used in application
   ShellLib

[Protocols]
   gEfiShellProtocolGuid
   gEfiTcp4ServiceBindingProtocolGuid
   gEfiTcp4ProtocolGuid

*Nt32Pkg.dsc*

[LibraryClasses.common.UEFI_APPLICATION]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
PrintLib|MdeModulePkg/Library/DxePrintLibPrint2Protocol/DxePrintLibPrint2Protocol.inf
   #added below for application
   ShellLib|ShellPkg/Library/UefiShellLib/UefiShellLib.inf
FileHandleLib|MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.inf

In the background simple C# TCP Server is running, I can connect to it 
for example using another C# app or using PuTTY.

I would appreciate any useful information, thank you.
Kind regards, Ivan