>Dear All,
>
>Would anyone help me to solve the problem for firing up a memo window when double click memo in a grid?
>
>Thanks in advance!

Put this into the TextBox Dblclick for stop the open memo window sequence:

NODEFAULT

Put this into a EditBox.DblClick method for open a memo window:

DEFINE WINDOW editWindow AT 10,10 SIZE 20,20 ;
  IN DESKTOP ;
  SYSTEM;
  TITLE "Edit this";
  CLOSE FLOAT GROW
MODIFY MEMO (m.this.controlSource) WINDOW editWindow && NOEDIT for readonly
RELEASE WINDOWS editWindow

Fabio