Why my printer.print only work AFTER I close the form?

Sorry, I know this sound stupid, but I never use printer.print before. I tried a single form with a single command button. Then I add this code:

Private Sub Command1_Click()
Printer.Print
Printer.Print "Hello World"
End Sub

I thought it will print a blank line and then a line of "Hello World", then stop right there (which is what I want), however, it does not do much at all when I click the command button (I check the printer queue, it wrote "spooling" but no action on the printer, only when I close the form (which shut it down), the printer reacts. Why is that? Can I just set the printer to print the two line and just stop there?

Private Sub Command1_Click()
Printer.Print
Printer.Print "Hello World"
Printer.EndDoc
End Sub

Thanks, that make the printer to work. However, it also eject the whole page. What I want is that it print the two lines and stop. The idea is to print other stuff more on the same page later. Help, please?