Manual override backlight Tiny 6410

SEA
Hello,

In winCE 6.0 I have changed the backlight setting (control panel), to dim
if there is no useractivity for 2 mins. This works fine, but a function of
my project is a digital pictureframe. When this funtion is active, i dont
want the backlight to Dim. How can i programaticaly prevent the backlight
going off in this mode ? I have tried standard functions of WinCE 6.0 like
resetting the "user activity timer" direct or with events but there is no
result. Has anybody have any experience with this ?

With kind regards,
Serge.