windows mobile下调用输入法并改变输入面板位置

    在编写全屏应用程序时，为了充分利用屏幕空间，将输入法面板取消。但是没有输入法面板，怎么进行输入，如何设定输入面板显示的位置呢？其中一种可行的方法是进行P/Invoke调用，在程序中调用输入法，界面效果图如下：



    代码如下所示：

using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace SmartDeviceProject1
{
    [StructLayout(LayoutKind.Sequential)]
    public struct RECT
    {
        public int Left;
        public int Top;
        public int Right;
        public int Bottom;
    }

    public struct SIPINFO
    {
        public int cbSize; // Set to 48
        public int fdwFlags; // Set to 0
        public Rectangle rcVisibleDesktop; // set to 0,0,0,0
        public Rectangle rcSipRect;
        public int dwImDataSize; // Set to 0
        public IntPtr pvImData; // Set to IntPtr.Zero

        public SIPINFO(int anyOne)
        {
            cbSize = Marshal.SizeOf(typeof(SIPINFO));
            fdwFlags = 0; // Set to 0
            rcVisibleDesktop = new Rectangle(0, 0, 0, 0);
            rcSipRect = new Rectangle(0, 0, 0, 0);
            dwImDataSize = 0;
            pvImData = IntPtr.Zero;
        }
    }

    public partial class Form1 : Form
    {
        [DllImport("coredll.dll")]
        public extern static void SipShowIM(uint dwFlag);
        [DllImport("coredll.dll")]
        public extern static bool SipSetDefaultRect(ref RECT rectf);
        [DllImport("coredll.dll")]
        public extern static bool SipSetCurrentIM(ref IntPtr cslid);
        [DllImport("coredll.dll")]
        public extern static bool SipGetCurrentIM(ref IntPtr cslid);
        [DllImport("coredll")]
        public extern static bool SipGetInfo(ref SIPINFO sipInfo);

        public static uint SIPF_OFF = 0x00;
        public static uint SIPF_ON = 0x01;

        private RECT originalRect;
        private int sipClsid;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //将输入面板上移50,开启输入法
            SIPINFO sipInfo = new SIPINFO(0);
            SipGetInfo(ref sipInfo);

            originalRect = new RECT();
            originalRect.Left = sipInfo.rcSipRect.X;
            originalRect.Top = sipInfo.rcSipRect.Y;
            originalRect.Right = sipInfo.rcSipRect.Right;
            originalRect.Bottom = sipInfo.rcSipRect.Height;

            RECT newRect = new RECT();
            newRect.Left = sipInfo.rcSipRect.X;
            newRect.Top = sipInfo.rcSipRect.Y - 50;
            newRect.Right = sipInfo.rcSipRect.Right;
            newRect.Bottom = sipInfo.rcSipRect.Height - 50;

            SipSetDefaultRect(ref newRect);
            sipClsid = inputPanel1.InputMethods[1].Clsid.GetHashCode();
            IntPtr pointClsid = new IntPtr(sipClsid);
            if (SipGetCurrentIM(ref pointClsid))
            {
                SipSetCurrentIM(ref pointClsid);
            }
            pointClsid = IntPtr.Zero;
            SipShowIM(SIPF_ON);
        }

        private void Form1_Closing(object sender, CancelEventArgs e)
        {
            //还原原始输入面板位置,关闭输入法
            SipSetDefaultRect(ref originalRect);
            sipClsid = inputPanel1.InputMethods[1].Clsid.GetHashCode();
            IntPtr pointClsid = new IntPtr(sipClsid);
            if (SipGetCurrentIM(ref pointClsid))
            {
                SipSetCurrentIM(ref pointClsid);
            }
            pointClsid = IntPtr.Zero;
            SipShowIM(SIPF_OFF);
        }
    }
}

　　更多内容，请参考Alex Gusev的文章：Managing the Software Input Panel in Your Applications