C# 开发PDA程序中软键盘（sip）覆盖录入区域的解决办法 -优快云博客

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace SmartDeviceProjectWcfTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.Load += new EventHandler(MainForm_Load);
        }


        private const int GWL_WNDPROC = -4;
        private const int WM_SETTINGCHANGE = 0x1A;
        private const int SPI_SETSIPINFO = 0xE0;

        private enum SIPStatus
        {
           SIPF_OFF = 0,
           SIPF_ON
        }
       [StructLayout(LayoutKind.Sequential)]
        public struct RECT
        {
            public Int32 left;
            public Int32 top;
            public Int32 right;
            public Int32 bottom;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct IMINFO
        {
            public Int32 cbSize;
            public IntPtr hImageNarrow;
            public IntPtr hImageWide;
            public Int32 iNarrow;
            public Int32 iWide;
            public Int32 fdwFlags;
            public RECT rcSipRect;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct SIPINFO
        {
            public Int32 cbSize;
            public Int32 fdwFlags;
            public RECT rcVisibleDesktop;
            public RECT rcSipRect;
            public Int32 dwImDataSize;
            public IntPtr pvImData;
        }

        delegate IntPtr WndProcDelegate(IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam);
        [DllImport ("coredll.dll", EntryPoint = "GetWindowLong")]
        private static extern IntPtr GetWindowLong (IntPtr hWnd, int nIndex);
        [DllImport ("coredll.dll")]
        static extern int SetWindowLong (IntPtr hWnd, int nIndex, IntPtr newWndProc);
        [DllImport ("coredll.dll")]
        static extern IntPtr CallWindowProc (IntPtr lpPrevWndFunc, IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
        [DllImport ("coredll")]
        static extern bool SipGetInfo (ref SIPINFO si);
        [DllImport("coredll.dll")]
        private static extern bool SipSetInfo(ref SIPINFO pSipInfo);

        private static IntPtr oldWndProc = IntPtr.Zero;
        private static WndProcDelegate newWndProc;

        protected virtual void SipPannelShow(){}
        protected virtual void SipPannelHide() { }

        private void MainForm_Load (object sender, EventArgs e)
        {
           newWndProc = new WndProcDelegate (WndProc);
           oldWndProc = GetWindowLong (this.Handle, GWL_WNDPROC);
           int success = SetWindowLong (this.Handle, GWL_WNDPROC, Marshal.GetFunctionPointerForDelegate (newWndProc));
        }
        public IntPtr WndProc (IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam)
        {
           if (msg == WM_SETTINGCHANGE && wParam.ToInt32() == SPI_SETSIPINFO)
           {
            SIPINFO sipInfo = new SIPINFO();
            sipInfo.cbSize = Marshal.SizeOf (typeof(SIPINFO));
            SipGetInfo(ref sipInfo);
            if ((sipInfo.fdwFlags & (int)SIPStatus.SIPF_ON) == (int)SIPStatus.SIPF_ON)
            {
             // Do something if the SIP is showing
                SipPannelShow();

            }
            else
            {
             // Do something if the SIP is NOT showing
                SipPannelHide();

            }
           }
           return CallWindowProc (oldWndProc, this.Handle, msg, wParam, lParam);
        }

        public static bool SipSetRect(int x, int y, int width, int height)
        {
            SIPINFO sipinfo = new SIPINFO();
            if (!SipGetInfo(ref sipinfo))
                return false;
            IMINFO iminfo = (IMINFO)Marshal.PtrToStructure(sipinfo.pvImData, typeof(IMINFO));
            iminfo.rcSipRect.left = x;
            iminfo.rcSipRect.right = x + width - 1;
            iminfo.rcSipRect.top = y;
            iminfo.rcSipRect.bottom = y + height - 1;
            Marshal.StructureToPtr(iminfo, sipinfo.pvImData, true);
            return SipSetInfo(ref sipinfo);
        }
    }
}

子窗体

   override protected void SipPannelShow()
        {

           this.panelMain.Height = this.panelMain.Height + 180;
           this.panelMain.Location = new Point(0, -180);

        }

        override void SipPannelHide()
        {
            base.SipPannelHide();
            this.panelMain.Height = this.panelMain.Height - 180;
            this.panelMain.Location = new Point(0, 0);
        }