NLedDriverGetDeviceInfo (Windows CE 5.0)
This function returns information about the notification LED device.
BOOL NLedDriverGetDeviceInfo(INT nId,PVOID pOutput);
Parameters
- nId
[in] Integer specifying the information to return. The following table shows the defined values.Value Description NLED_COUNT_INFO_ID Indicates that the pOutput buffer specifies the number of notification LEDs on the device. NLED_SUPPORTS_INFO_ID Indicates that the pOutput buffer specifies information about the capabilities supported by the notification LED. NLED_SETTINGS_INFO_ID Indicates that the pOutput buffer contains information about the notification LED current settings. - pOutput
[out] Pointer to the buffer to return the information. The buffer points to various structures depending on the value of nId. The following table shows these structures.Value of nID Structure in pOutput NLED_COUNT_INFO_ID NLED_COUNT_INFO NLED_SUPPORTS_INFO_ID NLED_SUPPORTS_INFO NLED_SETTINGS_INFO_ID NLED_SETTINGS_INFO
Return Values
TRUE indicates success. FALSE indicates failure.
Remarks
Hardware platforms without LEDs can set the cLeds member of p, which is of type NLED_COUNT_INFO, to zero (0). This sets the number of LEDs in the system to zero (0).
The following code example shows an implementation of NledDriverGetDeviceInfo.
BOOL
WINAPI
NLedDriverGetDeviceInfo(INT nInfoId, PVOID pOutput)
{
if ( nInfoId == NLED_COUNT_INFO_ID ) {
struct NLED_COUNT_INFO *p = (struct NLED_COUNT_INFO*)pOutput;
p -> cLeds = 0;
return (TRUE);
}
SetLastError(ERROR_GEN_FAILURE);
return (FALSE);
}
Requirements
OS Versions: Windows CE 1.0 and later.
Header: Led_drvr.h.
Link Library: Nleddrv.lib.
See Also
NLED_COUNT_INFO | NLED_SETTINGS_INFO | NLED_SUPPORTS_INFO
Send Feedback on this topic to the authors