I WANT TO USE CALCULATOR i.e., "CALC.EXE" program in my vb application.

1) HOW CAN I CALL THE PROGRAMM IN VB ?
2) HOW CAN I PUT MY RESULT TO THE CALCULATOR ?
3) HOW CAN I GET THE RESULT OF THE CALCULATOR SUCH THAT THE RESULT CAN BE PROCESED FURTHER IN MY APPLICATION ?

CAN ANY BODY SUGGEST ME ?

.... REGARDS