Psion Teklogix 7527S User's Guide download pdf (Page 214)

Chapter 22: Wireless Wide-Area Networking

Initializing The WWAN Driver

202 Psion Teklogix Mobile Devices SDK Developers Guide

Sample Code For Initializing WWAN

This example provides a safe and reliable way to ensure that the WWAN interface is initialized

correctly. This example is written in C++; however, the same process can be followed for a

.NETapplication.

Example 22.1 Initializing WWAN in C++

// Use this class in the function, InitializeWWANAndWait

class WWANReadyStateListener : public PsionTeklogix::WWAN::IndicationsListener

{

public:

WWANReadyStateListener()

{

// Create an event to wait on, this object signals it when WWAN is ready.

WwanReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);

}

~WWANReadyStateListener()

{

if (WwanReadyEvent != 0)

{

CloseHandle(WwanReadyEvent);

WwanReadyEvent = 0;

}

HANDLE GetWwanReadyEvent(){ return WwanReadyEvent; }

virtual void OnReadyState( const WWAN_READY_STATE &ReadyState )

{

if ((ReadyState.State & WWAN_READY_STATE_INITIALIZED) != 0 )

{

if (WwanReadyEvent != 0)

{

SetEvent(WwanReadyEvent);

}

private:

HANDLE WwanReadyEvent;

};

bool InitializeWWANAndWait()

{

WWanRequestParameters params = {0};

WWAN_READY_STATE* wwanReadyStatePtr = 0;

WwanRequestStatus retVal;

// See if the WWAN namespace has been initialized, and get the ready state.

retVal = WirelessWAN::GetReadyState(params, &wwanReadyStatePtr);

if(WwanRequestNotInitialized == retVal)

{

// The namespace is not initialized, attempt to do so:

if (WwanResultSuccess != WirelessWAN::Initialize())

{

// Error initializing the WWAN namespace.

return false;

}

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