At 3:41 PM -0700 2001/08/14, Johnathan Smith wrote:
>Can someone please tell me how to turn the light
>on/off on the palm in code?
Toggling the backlight is best done by posting a vchrBacklight key event, like this:
EvtEnqueueKey(vchrBacklight, 0, commandKeyMask);
But of course that doesn't help you if you want to explicitly turn it on or off. In
that case... you need to use one of the undocumented/private HAL APIs.
On Palm OS 3.5 and earlier, you can use:
Boolean HwrBacklight(Boolean set, Boolean newState);
On Palm OS 3.5 and later, you should use:
Err HwrDisplayAttributes(Boolean set, HwrDisplayAttrType attr, void* dataP);
passing hwrDispBacklight enum (I think the value is 18) for attr,
and a pointer to a Boolean containing the backlight state for dataP (false=off,
true=on).
Regards,
Jim Schram
Palm Incorporated
Partner Engineering
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