Problem with changing backcolor of picturebox

[Calan]

I have a form with some picture boxes as buttons. I'm setting the picture
property to a gif file for "normal", and to a different gif for the
"pressed" state. This works fine. I get into trouble with the fact that the
gif files have a transperent region in the middle (the button icon) that
lets the back color of the picture box show through. This lets me change the
button highlight to any user-specified color when I mouseover the picbox
(which is done very inefficiently I might add, but that's another story).

Everything works, except that I get occasional flicker that shows through
the image as the backcolor is changing. Is there a way to change the picture
box backcolor without any flicker? I've tried setting it to invisible and
then back, played with z-order, LockWindowUpdate API, etc., all to no avail.
Some type of memory painting/swapping maybe?

Any help is greatly appreciated. Any good advice for an efficient
"mouseover" event for controls would also be greatly appreciated.

Thanks much in advance

[TecCRC]

"Calan" <no**@nospam.com> wrote in
news:ip**************@fe25.usenetserver.com:

I have a form with some picture boxes as buttons. I'm setting the
picture property to a gif file for "normal", and to a different gif
for the "pressed" state. This works fine. I get into trouble with the
fact that the gif files have a transperent region in the middle (the
button icon) that lets the back color of the picture box show through.
This lets me change the button highlight to any user-specified color
when I mouseover the picbox (which is done very inefficiently I might
add, but that's another story).

Everything works, except that I get occasional flicker that shows
through the image as the backcolor is changing. Is there a way to
change the picture box backcolor without any flicker? I've tried
setting it to invisible and then back, played with z-order,
LockWindowUpdate API, etc., all to no avail. Some type of memory
painting/swapping maybe?

Any help is greatly appreciated. Any good advice for an efficient
"mouseover" event for controls would also be greatly appreciated.

Thanks much in advance

have you tried setting the autoredraw setting of the picture box to True?
this will eliminate flicker

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