windows mobile檢查SIM卡是否存在的方法

// PhoneNoSim
// Gets a value indicating whether the Subscriber Identity Module (SIM) is installed in the mobile device.
#define SN_PHONENOSIM_ROOT HKEY_LOCAL_MACHINE
#define SN_PHONENOSIM_PATH TEXT("System//State//Phone")
#define SN_PHONENOSIM_VALUE TEXT("Status")
#define SN_PHONENOSIM_BITMASK 2

 
////////////////////////////////////////////////////////////////////////////////
// PhoneInvalidSim
// Gets a value indicating whether the Subscriber Identity Module (SIM) is invalid.
#define SN_PHONEINVALIDSIM_ROOT HKEY_LOCAL_MACHINE
#define SN_PHONEINVALIDSIM_PATH TEXT("System//State//Phone")
#define SN_PHONEINVALIDSIM_VALUE TEXT("Status")
#define SN_PHONEINVALIDSIM_BITMASK 4

 
////////////////////////////////////////////////////////////////////////////////
// PhoneBlockedSim
// Gets a value indicating whether the Subscriber Identity Module (SIM) is blocked.
#define SN_PHONEBLOCKEDSIM_ROOT HKEY_LOCAL_MACHINE
#define SN_PHONEBLOCKEDSIM_PATH TEXT("System//State//Phone")
#define SN_PHONEBLOCKEDSIM_VALUE TEXT("Status")
#define SN_PHONEBLOCKEDSIM_BITMASK 8

裝置上有sim時,HKEY_LOCAL_MACHINE//System//State//Phone中的Status值0x188000a0,

BOOL GCheckSIMCardExist()
{
    HKEY  hKey    = NULL;
    DWORD dwDisposition;
    DWORD dwType;
    DWORD cbData;
    BOOL fgResult = FALSE;

    if(RegCreateKeyEx(HKEY_LOCAL_MACHINE, TEXT("//System//State//Phone"),
        0, NULL, 0, 0, NULL,
        &hKey, &dwDisposition) != ERROR_SUCCESS)
    {
        ASSERT(0);
    }
    cbData = sizeof(DWORD);
    if (RegQueryValueEx(hKey, _T("Status"), 0, &dwType,
        (LPBYTE) &dwDisposition, &cbData) != ERROR_SUCCESS)
    {
        ASSERT(0);
    }
    RegCloseKey(hKey);

   // return value is  0x002000a2 when not exist sim.
    dwDisposition &= 0x2;
    if(dwDisposition == 0)
    {
        fgResult = TRUE;
    }
}

 

 

http://hailang19821213.blog.163.com/blog/static/306794612010315111847763/