const
  ppIdle : Integer = -1;
  ppNormal : Integer = 0;
  ppHigh : Integer = 1;
  ppRealTime : Integer = 2;

function SetProcessPriority( Priority : Integer ) : Integer;
var
  H : THandle;
begin
  Result := ppNormal;
  H := GetCurrentProcess();
  if ( Priority = ppIdle ) then
    SetPriorityClass( H, IDLE_PRIORITY_CLASS )
  else
  if ( Priority = ppNormal ) then
    SetPriorityClass( H, NORMAL_PRIORITY_CLASS )
  else
  if ( Priority = ppHigh ) then
    SetPriorityClass( H, HIGH_PRIORITY_CLASS )
  else
  if ( Priority = ppRealTime ) then
    SetPriorityClass( H, REALTIME_PRIORITY_CLASS );
  case GetPriorityClass( H ) of
    IDLE_PRIORITY_CLASS : Result := ppIdle;
    NORMAL_PRIORITY_CLASS : Result := ppNormal;
    HIGH_PRIORITY_CLASS : Result := ppHigh;
    REALTIME_PRIORITY_CLASS : Result := ppRealTime;
  end;
end;

function GetProcessPriority : Integer;
var
  H : THandle;
begin
  Result := ppNormal;
  H := GetCurrentProcess();
  case GetPriorityClass( H ) of
    IDLE_PRIORITY_CLASS : Result := ppIdle;
    NORMAL_PRIORITY_CLASS : Result := ppNormal;
    HIGH_PRIORITY_CLASS : Result := ppHigh;
    REALTIME_PRIORITY_CLASS : Result := ppRealTime;
  end;
end;

function SetProcessPriority( Priority : Integer ) : Integer;

function GetProcessPriority : Integer;