[Gambas-user] How do I replace Image transparent background with a white background?

[RICHARD WALKER]

Shucks. Too bad - it looked so simple, and it was quick. Trouble is,
it didn't do anything - at least, nothing discernible in the result -
still a black background.

On the up-side, I know that my crude and slow
"If pixel_colour = &HFF000000 Then pixel_colour = &H00FFFFFF"
will actually do what I need, if I can live long enough too see the
result on a 400x150 picture.

R