If you've already set the
PictureBox
's dock property to
Fill
, then the
PictureBox
is filling the available space on the form.
The most likely issue is that the picture displayed within the
PictureBox
is not stretching to fill the whole
PictureBox
.
Set the
PictureBox
's
SizeMode property[
^] to an appropriate value - eg: either
StretchImage
or
Zoom
, depending on whether or not you want to keep the original aspect ratio of the image.