PT-9230 Mobile Computer SDK Programming Manual 11
Display Related Functions
BacklightOn
To turn ON or OFF the LCD screen back-light.
DWORD BacklightOn
{
BOOL bOn
}
Parameters
bOn
[in] Flag that indicates whether to turn ON screen back-light(TRUE) or turn OFF screen
back-light(FALSE).
Returned Values
If this action succeeds, the returned value is E_FUNC_SUCCEED. If this action fails, the returned value is
E_FUNC_ERROR, E_FUNC_PAR_ERROR.
Remarks
After this action turning ON or OFF the screen back-light, the back-light will be always ON or OFF. The back-light
setting of display properties in control panel does not work until the terminal been reseted.
Example
DWORD dwResult;
dwResult = BacklightOn(TRUE);
if(dwResult != E_FUNC_SUCCEED)
AfxMessageBox(_T("BacklightOn fail"));
Requirements
OS Versions: Windows CE 6.0 or beyond.
Header: sysapiax.h
Link Library: sysapiax.lib
Link DLL: sysapiax.dll
Device: PT90
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