from where like XOJO, C++

For XOJO

try

data = mReport.PrintToBuffer(EVReportPrintType.kToHTML, 1 )

Exception err as VException
dim errNumber as Integer = err.ErrorNumber
dim errString as String = err.Message
MsgBox "2)Error " + errString
end

HTMLViewer1.LoadPage(data)

use HTMLViewer1.Print

Hello Ronaldo,

For WEB you can use WebHTMLViewer (http://docs.xojo.com/index.php/WebHTMLViewer.Print)

But as said on the description page its behaviour depends on the user browser:

Firefox and Internet Explorer print the contents of the entire web page, not just the WebHTMLViewer.

Another way is to generate the PDF and let the user print it.
From our example (V4RB_7/Examples/VReport/WebOnSQLite/WebOnSQLite.xojo_binary_project):

// MAKE  PDF in RAM

Dim pdfData As String = mReport.PrintToBuffer( EVReportPrintType.kToPDF, 1 )

		

// Prepare download

mPDF = New WebFile

mPDF.MimeType = "application/pdf"

mPDF.FileName = "report.pdf"

mPDF.ForceDownload = False

mPDF.Data = pdfData

.....

// Present download link to generated PDF

Link_PDF.URL = mPDF.URL

Link_PDF.Text = "PDF File - Click here to see it..."

mPDF - is the property of the WebPage of type WebFile
Link_PDF - is the link on the WebPage

Thanks!

Is it possible to print directly to printer without without the PREVIEW?

Assuming I am creating web based Point of Sales. I wanted that when the user CLICKED paid, the web app automatically print the receipt. Is it possible?

If the printer is attached to the user computer, I don't think it is possible to skip the preview.