En el siguiente codigo solo deberas cambiar la variable RutaBd.
Código Delphi
[-]procedure CrearBD;
var
DataBase: TIbDataBase;
begin
DataBase := TIbDatabase.Create(Application);
try
Database.DatabaseName := RutaBD;
Database.SQLDialect := 3;
with Database.Params do
begin
Clear;
Add('user ''SYSDBA''');
Add('password ''masterkey''');
Add('page_size = 8192');
Add('default character set ISO8859_1');
end;
Database.CreateDatabase;
finally
FreeandNil(DataBase);
end;
end;