Manual resize of widgets

[Ferdinand Ramirez <ramirez ferdinand yahoo com>]

Suppose I add a widget to GtkTextView and want to resize the widget manually using the mouse, is there some 
property I would need to set to enable this functionality? 

The widget that needs to be resized is a GtkFrame.

And what about for a Pixbuf with an image in it? How can I resize this manually after adding it to 
GtkTextView?

Thanks,
-Ferdinand