oSay:SetColor(CLR_BLACK, CLR_RED)
 oSay:Refresh()Please try oSay:lTransparent :- .F.
Note: I did not try it myself here.
FUNCTION Clientes()
  LOCAL iDCor
  For iDCor=401 to 423 // SHADED, SHADOW
    REDEFINE SENSITIVE SAY ID iDCor OF oFld:aDialogs[ 1 ]         ;
     COLOR CLR_BLACK, CLR_WHITE UPDATE FONT oFont RIGHT TRANSPARENT
  Next iDCor // By Ednaldo Rolim - Yes!
  //--- Melhoria visual nos say's
  For iDCor=401 to 410
    REDEFINE SENSITIVE SAY ID iDCor OF oFld:aDialogs[ 2 ]      ;
    COLOR CLR_BLACK, CLR_WHITE UPDATE FONT oFont RIGHT TRANSPARENT
  Next iDCor  // By Ednaldo Rolim - Yes!
  //--- Melhoria visual nos say's
  For iDCor=411 to 416
    REDEFINE SENSITIVE SAY ID iDCor OF oFld:aDialogs[ 2 ]      ;
    COLOR CLR_BLACK, CLR_WHITE UPDATE FONT oFont RIGHT TRANSPARENT
  Next iDCor  // By Ednaldo Rolim - Yes!
  //--- Melhoria visual nos say's
  For iDCor=401 to 409
    REDEFINE SENSITIVE SAY ID iDCor OF oFld:aDialogs[ 3 ]      ;
    COLOR CLR_BLACK, CLR_WHITE UPDATE FONT oFont RIGHT TRANSPARENT
  Next iDCor  // By Ednaldo Rolim - Yes!
  //--- Melhoria visual nos say's
  For iDCor=401 to 412
    REDEFINE SENSITIVE SAY ID iDCor OF oFld:aDialogs[ 4 ]      ;
    COLOR CLR_BLACK, CLR_WHITE UPDATE FONT oFont RIGHT TRANSPARENT
  Next iDCor  // By Ednaldo Rolim - Yes!
  //--- Melhoria visual nos say's
  For iDCor=401 to 407
    REDEFINE SENSITIVE SAY ID iDCor OF oFld:aDialogs[ 5 ]      ;
    COLOR CLR_BLACK, CLR_WHITE UPDATE FONT oFont RIGHT TRANSPARENT
  Next iDCor  // By Ednaldo Rolim - Yes!
  //--- Melhoria visual nos say's
  For iDCor=401 to 421
    REDEFINE SENSITIVE SAY ID iDCor OF oFld:aDialogs[ 6 ]      ;
    COLOR CLR_BLACK, CLR_WHITE UPDATE FONT oFont RIGHT TRANSPARENT
  Next iDCor  // By Ednaldo Rolim - Yes!
  //--- Melhoria visual nos say's
  For iDCor=401 to 414
    REDEFINE SENSITIVE SAY ID iDCor  OF oFld:aDialogs[ 7 ]      ;
    COLOR CLR_BLACK, CLR_WHITE UPDATE FONT oFont RIGHT TRANSPARENT
  Next iDCor  // By Ednaldo Rolim - Yes!
  //--- Melhoria visual nos say's
  For iDCor=401 to 412
    REDEFINE SENSITIVE SAY ID iDCor  OF oFld:aDialogs[ 8 ]      ;
    COLOR CLR_BLACK, CLR_WHITE UPDATE FONT oFont RIGHT TRANSPARENT
  Next iDCor  // By Ednaldo Rolim - Yes!
RETURN NIL