hey guyz, i am developiung an application for that i need to know the architecture of oracle 9i can some body suggest me sites fromn where i can download "FREE" PDF'S OR free online tutorilals

hi, i am writing an application where i want to authenticate the password. I wan that when user type his password , nothing should be echoed on the screen. plz help me out

where should i browse that dll? i need to add refrence but i cant locate that file

this i valid namespace in c# but in vb.net there is no namespace with this name. u can try it out

i m making an application in wich i need to send mail can anyone plz help me remember there is no namespace "system.web" and there is no class smtpmailmessage in vb.net plz help a code will be more helpful

i want to make an applicaton ( in VB.NET) through which i can send mail i also want to add option of "cc" and "bcc" and also of attaching files is, there any method in vb.net to send mails plz help me as i m new in this field. a code will be very useful

is there any method to build datagrid with check boxes.

i have a database which contain 2 tables "table1" and "table2" i had defined primary and foreign keys i had use adapter adap1 for "table1" and adap2 for "table2" now i had generated a dataset "ds" using adap1 and adap2 adap1.fill(ds) adap2.fill(ds) now i want to have a relation in both tables in wizard , we can do this by going into schema of dataset and creating relation but can it be done through code plz help code will be more useful

use oledbcommand //con is oledbconnection dim com as oledbcommand=new oledbcommand("drop table tablename",con) con.open com.executenonquery(); con.close hope this will work

u can do it first strore the values in some global vaiable. for that u can make a module. therefore that values will be accessible to all forms then u can use those values in ur datagrid

tell te exception or error u r getting

i m using ms-access as database so, plz tell is there any method thnks

i had made a program in which i had executed "inser, delete and modify " command of SQL but can anybody tell me how to make new database, new table in a database and alter table queries code will me more helpful

i want t have a datagrid with checkbox. can anyone help me code will be more helpful

i want to retrieve of a table whose schema and other constraints i do not know basically , i had given user opurtunity to browse the database (and select any table) and based on that i will display the priary keys(if it does not had primey keys then a msgbox will be displayed) is there any method to know wheteher table has primary keys and to bind that column to the combobox plz help a code snippet will be more helpfull....

datasource is used i database (oledb connections) use this funda dim i as integer for i=0 to course.lenght-1 f1.courselist.items.add(course(i)) next f1.show() hope this will works

it still not working is there any method top get the name of that column.

i want to build a menu bar which contains options like "new" "save" "save as" "open" "print" i want that text and images (both) should be dispalyed setting text is not a problem but i dont know how to bring icons in menubar plz help code snippet will be very helpful

i had written the code but i m still getting exceptions here is my code con is oledbconnection adap is oledbdataadapter ds is dataset con = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Password=;User ID=Admin;Data Source=D:\Documents and Settings\sumit\My Documents\db1.mdb") adap = New OleDbDataAdapter("select * from table4", con) ds = New DataSet("testing") adap.FillSchema(ds, SchemaType.Mapped) Dim i As Integer Try For i = 0 To ds.Tables("table4").PrimaryKey.GetUpperBound(0) combobox1.items.add(ds.Tables("Table4").PrimaryKey(i).ColumnName()) Next Catch ex As System.Exception MsgBxox(ex.Source + " " + ex.Message + " " + ex.ToString) End Try End Sub and i m getting the exception "object refrence not set to instance of object" help plz

i m using ms access plz help me code will be very useful