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Hola gente, estoy usando Richedit5 así, y me gustaría controlar si modificaron el texto y salieron por la X sin guardar, se puede?

Static Function RichEdit5( cText, cTitle, nTop, nLeft, nBottom, nRight )
local oFont, oDlg, oMemo
local hDLL
local uTemp := If( ! Empty( cText ), cText, '' )
local lRich := .F., lGTF := .F., lOk := .F.
DEFAULT nTop := 9, nLeft := 9, nBottom := 27, nRight := 71.5,;
cTitle := "RichEdit5"
DEFINE FONT oFont NAME "Ms Sans Serif" SIZE 0, -10
DEFINE DIALOG oDlg FROM nTop, nLeft TO nBottom, nRight ;
TITLE cTitle FONT oFont
oDlg:lTruePixel := .F.
oDlg:lHelpIcon := .F.
@ 30, 3 RICHEDIT5 oMemo VAR uTemp OF oDlg PIXEL SIZE 200, 200
oDlg:oClient = oMemo
ACTIVATE DIALOG oDlg CENTERED ;
ON INIT ( BuildRichEditBar( oDlg, oMemo, { | c | cText := c } ), oDlg:ReSize() )
oFont:End()
return lOk

Saludos
Jorge