I think you may be making this harder than need be. Try creating a local, parameterized view:

create sql view RptCursor as select * from Imprn where PrintNo = ?nPrintNo

Then in your form DE, you can add this view. Set the NoDataOnLoad to .T. and in the BeforeOpenTables, put set talk off. In the click, put this code:

local nPrintNo
nPrintNo = thisform.txt_printno.value
requery("RptCursor")

Add whatever other code you need around this.