in any entry form we write statement for inserting data,updating data,deleting data,finding data,
and also calling store procedure repeatedly. if i can develop a global data access component then
i have to write very minimum code for doing things like inserting data,updating data,deleting data,
finding data,and also calling store procedure.so please give me the concept how could i write my
own data access component which reduce statement. if possible give me the source code.

Search for SQL Helper class from Microsoft and you can build from there. This covers SQL server  so you can add data providers for OLE DB, Oracle, MySQL datasources. I believe a link to this component was posted here sometime but i am not sure so, do google and i am sure you will find this class/component useful

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BrainBench ADO.NET and ASP.NET Certified Developer