问个托管VC++的， sqlstr=S"select * from T_login where uid=某一textBox and pwd=某一textBox"这个SQL语句怎么写啊谢谢了

sqlstr=S"select * from T_login where uid='"+ textBox1 +"' and pwd='"+ textBox2 +"'"
这样可以么．．．不行吧．．．uid='"+ textBox1 +"'这两个会相等么？pwd='"+ textBox2 +"'这能行么