Use ?? then. This is a snippet of our code and it works on our dot matrix printers in Epson mode:

set console off
set printer on

??? opt
??? av_lpi8
??? av_cndsprt

*---Print Contract

? " -------------------------------------------------------- "
? "| AGREEMENT                                              |"
?? Co_Line1 AT 1
?? In_Line1 AT 90
*--Etc.

>Hi,
>
>Thank for your advise and response.
>At least I know that I am not alone on
>this issues. It is a pain testing out printer.
>
>Regarding the ??? and ?,
>Isn't ? like ?? except it end with linefeed & carriage return ?
>whileas ??? is directed to printer only.
>I trying to use ?/?? as it can specify each font to use
>whileas ??? is depend on the printer fonts. I need to
>print language like Chinese characters beside English characters.
>
>Below are my sample code, it just linefeed and cut paper before
>printing the two sentence below and stop.
>
>
>
>Any way to stop the linefeed and cut my paper before printing
>the text ?
>
>I am using Epson ESC/POS command below with my ??? command.
>Next, how do you detect paper out or offline status
>with your application ?
>
>Thank in advance.
>
>
>SET CONSOLE OFF
>SET PRINTER on
>
>* set emphasize on
>??? CHR(27)+CHR(69)+CHR(1)
>? 'Hello world'
>
>set emphasize off
>??? CHR(27)+CHR(69)+CHR(0)
>? 'Hello world'EJECT
>
>SET CONSOLE ON
>SET PRINTER off
>SET PRINTER to
>
>
>>Hi Virusim,
>>
>>We ran into the same problem. When we use ?, here is an example of how we do it. All printer codes are sent using ??? and text using ?:
>>
>>

>>*--Select the printer for this form and set device to printer
>>IF !printset("CONTRACT")
>>   RETURN
>>ENDIF
>>
>>set console off
>>set printer on
>>
>>*--Specific printer commands like those used below are stored in a table
>>*--for each printer type the variables that contain those escape commands
>>*--like av_cpi12 below are pulled from the table in the printset() call
>>*--above for this report.
>>??? av_cpi12
>>??? av_boldon
>>? 'REMAINING PROVISIONS OF YOUR PREMIUM SERVICE AGREEMENT'
>>??? av_boldoff
>>??? av_cndsprt
>>
>>eject
>>
>>*--Set the printer back to 6lpi and 10cpi - resetopt values are stored
>>*--in a table for each printer type
>>??? resetopt
>>
>>set console on
>>set print off
>>
>>*--Set device to screen, etc.
>>DO prntrset
>>