phone.cs

清华大学出版社出版的 移动应用开发宝典 张大威（2008）的附书源代码

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace Chapter9
{
    public static class Phone
    {
        public static void MakeCall(string number, bool prompt)
        {
            PHONEMAKECALLINFO pmci = new PHONEMAKECALLINFO();
            pmci.cbSize = Marshal.SizeOf(pmci);
            pmci.dwFlags = prompt ? PMCF.PROMPTBEFORECALLING : PMCF.DEFAULT;
            pmci.pszDestAddress = number;

            int result = PhoneMakeCall(ref pmci);

            if (result != 0)
            {
                //Ignore if user cancels the operation
                if (result != 0x000004C7)
                {
                    throw new System.ComponentModel.Win32Exception(result, "Error calling PhoneMakeCall");
                }
            }
        }

        //Phone API
        [DllImport("phone", SetLastError = true)]
        internal static extern int PhoneMakeCall(ref PHONEMAKECALLINFO ppmci);

        [StructLayout(LayoutKind.Sequential)]
        internal struct PHONEMAKECALLINFO
        {
            public int cbSize;
            public PMCF dwFlags;
            [MarshalAs(UnmanagedType.LPWStr)]
            public string pszDestAddress;
            [MarshalAs(UnmanagedType.LPWStr)]
            string pszAppName;
            [MarshalAs(UnmanagedType.LPWStr)]
            string pszCalledParty;
            [MarshalAs(UnmanagedType.LPWStr)]
            string pszComment;
        }

        internal enum PMCF
        {
            DEFAULT = 0x00000001,
            PROMPTBEFORECALLING = 0x00000002,
        }

    }
}