GetWirelessDevices (Compact 7)
3/12/2014
This function retrieves the linked list of the wireless devices in the system.
Syntax
HRESULT GetWirelessDevices(
RDD **pDevices,
DWORD dwFlags
);
Parameters
- pDevices
[out] Address of a pointer to receive a linked list of devices. On success, the list will be populated with devices stored in RDD type nodes.
dwFlags
[in] Options that specify which devices to retrieve and whether or not to retrieve the desired state.The following table shows the possible flag values.
Flag Value Description WIRELESS_GET_DESIRED
1
This flag returns the desired state of the device in the dwDesired member of the RDD structure. This is the user's preferred state when wireless signals are on. For example, if the user has set the phone checkbox in the Power section of Control Panel, but turned all wireless devices off, this member would be 1, but the actual state, dwState, would be 0. If you are only interested in the current state of devices, do not pass this flag and do not expect a meaningful value to be returned in the dwDesired member.
WIRELESS_NO_POWER_MAN
2
This flag causes GetWirelessDevices to exclude any power managed wireless LAN adapters from the returned list.
WIRELESS_NO_PHONE
4
Passing this flag causes GetWirelessDevices to exclude any phone radios from the returned list of devices.
Return Value
The following table shows the return values for this function.
| Value | Description |
|---|---|
S_OK |
Successfully retrieved the list of wireless devices. |
E_FAIL |
Unspecified failure. |
E_OUTOFMEMORY |
Insufficient memory |
Other error messages maybe returned depending on the device.
Remarks
To retrieve only the wireless devices in the system and their current states, pass 0 in dwFlags. The current state will be returned in the dwState member of the RDD structure.
The application that calls GetWirelessDevices is responsible for releasing the link list when it is no longer needed. To release the list, call FreeDeviceList function and pass the pointer to the list. This function traverses the list and releases all RDD nodes that contain wireless device information.
Requirements
Header |
wrlspwr.h |
Library |
ossvcs.lib |