var
  DatabaseName, ServerName, UserName, ThePassword: string;
begin
  ServerName := 'BigRedS';
  UserName := 'SYSDBA';
  ThePassword := 'masterkey';
  if LocalInterbase then DatabaseName := 'd:\delphi\work\bigreds.gdb'
  else DatabaseName := 'conan@vol1:\delphi\work\bigreds.gdb';

  if Report1.Connect(ctIDAPIInterBase, ServerName, UserName, ThePassword, DatabaseName) then Report1.Run;
end;

The Server type is in reports.pas.  Here are the constants:

const
  ctDBase = 2;
  ctExcel = 3;
  ctParadox = 4;
  ctAscii = 5;
  ctSqlServer = 6;
  ctOracle = 7;
  ctDB2 = 8;
  ctNetSQL = 9;
  ctSybase = 10;
  ctBtrieve = 11;
  ctGupta = 12;
  ctIngres = 13;
  ctWatcom = 14;
  ctOcelot = 15;
  ctTeraData = 16;
  ctDB2Gupta = 17;
  ctAS400 = 18;
  ctUnify = 19;
  ctQry = 20;
  ctMinNative = 2;
  ctMaxNative = 20;
  ctODBCDBase = 40;
  ctODBCExcel = 41;
  ctODBCParadox = 42;
  ctODBCSqlServer = 43;
  ctODBCOracle = 44;
  ctODBCDB2 = 45;
  ctODBCNetSql = 46;
  ctODBCSybase = 47;
  ctODBCBtrieve = 48;
  ctODBCGupta = 49;
  ctODBCIngres = 50;
  ctODBCDB2Gupta = 51;
  ctODBCTeraData = 52;
  ctODBCAS400 = 53;
  ctODBCDWatcom = 54;
  ctODBCDefault = 55;
  ctODBCUnify = 56;
  ctMinODBC = 40;
  ctMaxODBC = 56;
  ctIDAPIStandard = 60;
  ctIDAPIParadox = 61;
  ctIDAPIDBase = 62;
  ctIDAPIAscii = 63;
  ctIDAPIOracle = 64;
  ctIDAPISybase = 65;
  ctIDAPINovSql = 66;
  ctIDAPIInterbase = 67;
  ctIDAPIIBMEE = 68;
  ctIDAPIDB2 = 69;
  ctIDAPIInformix = 70;
  ctMinIDAPI = 60;
  ctMaxIDAPI = 70;