UE4 external open EXE file

Recently, I saw a problem when I studied the unreal source code , I want to try opening the packaged exe file , I found these two functions

Header files need to be added in the early stage

#include"Runtime/Core/Public/HAL/PlatformFilemanager.h"  
#include"Runtime/Core/Public/Misc/FileHelper.h"
#include"Runtime/Core/Public/Misc/Paths.h"
#include "Windows/AllowWindowsPlatformTypes.h"
#include "Windows/PreWindowsApi.h"
#include <windows.h> 
#include <string>
#include "Windows/PostWindowsApi.h"
#include "Windows/HideWindowsPlatformTypes.h"
#include <ShlDisp.h>
#include <shellapi.h>

One 、UFUNCTION(BlueprintCallable)
        void OpenExternalApp(const FString& AppPath);

.h file 
UFUNCTION(BlueprintCallable)
		void OpenExternalApp(const FString& AppPath);

.cpp file 
void AMyGameMode::OpenExternalApp(const FString& AppPath)
{
	pHandle = FPlatformProcess::CreateProc(*AppPath, nullptr, true, false, false, nullptr, 0, nullptr, nullptr);
	UE_LOG(LogTemp, Warning, TEXT(__FUNCTION__"Create App"))
}

Two 、UFUNCTION(BlueprintCallable)
        void ExecuteExternalApp(const FString& AppPath);

.h file 
UFUNCTION(BlueprintCallable)
		void ExecuteExternalApp(const FString& AppPath);
.cpp file 
void AMyGameMode::ExecuteExternalApp(const FString& AppPath)
{
	std::string str_path = TCHAR_TO_UTF8(*AppPath);
	std::wstring wstr_path;
	wstr_path.assign(str_path.begin(), str_path.end());
	ShellExecute(NULL, L"open", wstr_path.c_str(), NULL, NULL, SW_SHOWDEFAULT);
}

3、 ... and 、 Blueprint operation

Open the stage blueprint , I put it here GamemMode Written inside