Image.Stretch (gb.qt4)
Function Stretch ( Width As Integer, Height As Integer [ , Fast As Boolean ] ) As Image
 
Returns a stretched copy of the image.
You can specify 
-1 as width or height if you want to keep the image aspect ratio.
When you want to draw a stretched image, it is usually faster to directly use
the 
Width and 
Height arguments of the 
Draw.Image method than first stretching the image,
and then drawing it.