Creating IDOC from ABAP Program

Hi folks,

Could any one tell me the procedure how to process IDOC form ABAP program. for example i want to send MATMAS idoc to other system. now we are able to send through Tcode BD10 to XI. we jsut want to send through ABAP program. is it possible to do so..if so could u pls let me know the procedure..thanks in advance.

santosh.