Hello Babi,
There's no easy way to bring up that dialog directly. You could switch the focus to the table and use the FakeKeystroke function to simulate the VAL_POPUP_MENU_VKEY being pressed. But that will only display the Goto/Find/Sort menu. Your user would still have to select find from that menu.
To have the same user experience, you'll have to create your own dialog. It's not that hard to do, in the UI editor. Just put in the right controls until it looks like the built-in dialog. Then, to actually perform the search, you can use the
GetTableCellFromValue library function, which has pretty much the same functionality as what it is in that dialog.
Luis