DataWindow, OLE, and RichTextEdit controls and windows
A resizable window or control has a thick border, and the user can use the mouse or the keyboard to resize it.
To allow a user to resize a window or control:
Select the Resizeable check box on the General page of the window’s or control’s Properties view.
The Resizable property takes a boolean value.
This statement makes the DataWindow control dw_1 resizable.
dw_1.Resizable = TRUE