在.Net使用电话API

仍然需要调用非托管代码实现。

     < System.Runtime.InteropServices.DllImport( " phone.dll " ) >  _
     Private   Shared   Function PhoneMakeCall() Function PhoneMakeCall(ByRef ppmci As   
      PhoneMakeCallInfo) As IntPtr                                          
    End Function                                                                        
PhoneNumber.Insert(PhoneNumber.Length,  "   " )                       
Dim  cPhoneNumber()  As   Char   =  PhoneNumber.ToCharArray()
Dim  pAddr()  As   Char   =  cPhoneNumber                                  
Dim  info  As  PhoneMakeCallInfo  =   New  PhoneMakeCallInfo          
info.cbSize  =  System.Runtime.InteropServices.Marshal.SizeOf(info)
Dim  iPhoneNumber  As  IntPtr  =  Marshal.AllocHLocal(cPhoneNumber.Length)   
        System.Runtime.InteropServices.Marshal.Copy(cPhoneNumber,  0 ,            
          iPhoneNumber, cPhoneNumber.Length)                                                   
info.pszDestAddress  =  iPhoneNumber

读取SMS的内容MSDN上有：
http://www.microsoft.com/china/MSDN/library/archives/library/dnppc2k2/html/sim_programming.asp