uses
 DbiProcs;

function GetDirByDatabase(Database: TDatabase): string;
var
 pszDir: PChar;
begin
 pszDir := StrAlloc(255);
 try
 DbiGetDirectory(Database.Handle, True, pszDir);
 Result := StrPas(pszDir);
 finally
 StrDispose(pszDir);
 end;
end;

function GetPhNameByAlias(sAlias: string): string;
var
 Database: TDatabase;
 pszDir: PChar;
begin
 Database := TDatabase.Create(nil); {allocate memory}
 pszDir := StrAlloc(255);
 try
 Database.AliasName := sAlias;
 Database.DatabaseName := 'TEMP'; {requires a name -- is ignored}
 Database.Connected := True; {connect without opening any table}
 DbiGetDirectory(Database.Handle, True, pszDir); {get the dir.}
 Database.Connected := False; {disconnect}
 Result := StrPas(pszDir); {convert to a string}
 finally
 Database.Free; {free memory}
 end;
end;