TADOConnection控件怎么在原程序中使用

TADOConnection控件如何在原程序中使用？
在原程序中
TADOConnection   *con1   =   new   TADOConnection(this);//这一句不出错。
String   s1,pwd;
s1   =   "Provider=SQLOLEDB.1;Persist   Security   Info=False;   ";
        s1+=   "User   ID=sa;pwd= ";
        s1+=   pwd;
        s1+=   ";Initial   Catalog=master;Data   Source=. "     ;
      con1-> ConnectionString   =   s1;//这一句为何出错
      con1-> LoginPrompt   =   false;
      con1-> Connected=true   ;

[解决办法]
~!~原来可没这么说啊！

Console wizard 下
TADOConnection *con1 = new TADOConnection(this);//这一句不出错????????
this是什么意思？？

[解决办法]
CoInitialize(NULL);

TADOConnection *con1 = new TADOConnection(NULL);//这一句不出错。
printf( "HelloWorld ");
String s1,pwd;
s1 = "Provider=SQLOLEDB.1;Persist Security Info=False; ";
s1+= "User ID=sa;pwd= ";
s1+= pwd;
s1+= ";Initial Catalog=master;Data Source=. " ;
con1-> ConnectionString = s1;//这一句为何出错
con1-> LoginPrompt = false;
con1-> Connected=true ;
delete con1;

CoUninitialize();