get-window-text-extent in Miscellaneous

Returns the pixel size of a string drawn as a window's label or value.

See also get-text-extent .

• (get-window-text-extent string font) -> two exact non-negative integers: width and height
     string : string
     font : font% object

  Returns the extent of the given string drawn with the given font. For information about the font used to draw a window's label or value, see set-label-font and set-control-font.