How to stop ejecting paper in dot matrix printer when the last line is printed in VB.Net

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VB

printing

I am new in VB.Net. I created an application in vb.bet to print user entered details from a text box in VB.Net using PrintDocument Class. The program prints the details from the text boxes correctly but the Epson LX 300+ii printer does not stop when the last line is printed. The paper that the dot matrix printer uses in nearly A4 sized. I only need to print half size of the A4 paper that means extra half size is not needed.
When I visited a shop I saw that the Epson LX 300+ii printer is not ejecting the single A4 sized paper completely, it stops when the required paper size is obtained.
Please give me a solution to stop the paper or adjusting the paper size.