[xFas]

Sigue sin funcionarme, os dejo código para que podáis ver lo que estoy intentando

Código Delphi [-]
try
  FillChar(SEInfo, SizeOf(SEInfo), 0);
  SEInfo.cbSize := SizeOf(TShellExecuteInfo);
  with SEInfo do begin
   fMask           := SEE_MASK_NOCLOSEPROCESS;
   Wnd             := 0;
   lpFile            := PWIDEChar(RegQueryStringValue('SOFTWARE\Firebird Project\Firebird Server\Instances', 'DefaultInstance')+'bin\gbak.exe');
   nShow          := SW_HIDE;
   lpParameters := PWIDEChar('-v -t -user SYSDBA -password "masterkey" LOCALHOST: DATABASE ' + 'REMOTE:/Programacion/Backup_Firebird');
  end;
  if ShellExecuteEx(@SEInfo) then begin
   repeat
    GetExitCodeProcess(SEInfo.hProcess, ExitCD);
   until (ExitCD <> STILL_ACTIVE) or (Terminated);
  end;