Return control to the application?

Question

C++ / C#

Hello.
I inject a shellcode into a process, but after execution, the process closes.
It is logical to assume that it has nowhere to go, because after execution there is no return of control to the application.
How can I make the application work normally after executing the shellcode?

HANDLE hProc = OpenProcess(PROCESS_ALL_ACCESS, FALSE, GetPID("exeinfope.exe"));
  LPVOID remoteBuffer = VirtualAllocEx(hProc, NULL, sizeof xcode, (MEM_RESERVE | MEM_COMMIT), PAGE_EXECUTE_READWRITE);
  WriteProcessMemory(hProc, remoteBuffer, xcode, sizeof xcode, NULL);
  HANDLE remoteThread = CreateRemoteThread(hProc, NULL, 0, (LPTHREAD_START_ROUTINE)remoteBuffer, NULL, 0, 0);
  CloseHandle(hProc);