Touch Screen Calibration (WinCE)

This article will explain how to do touch screen calibration in WinCE.

Touch Screen Calibration using Control Panel

• Click on Start->Settings->Control Panel->Stylus->Calibration->Recalibrate.
• Calibrate the five point accurately.
• Press ENTER if keyboard is connected else TAP on the screen, it will exit the calibration screen.
• Save registry from Start->Programs->ColibriTools->SaveReg.

Touch Screen Calibration from code

BOOL WINAPI TouchCalibrate(void) function is used to calibrate touch screen in WinCE.

For more information visit msdn

C/C++

int wmain()
{
    TouchCalibrate();
    if( ERROR_SUCCESS != RegFlushKey( HKEY_LOCAL_MACHINE))
       RETAILMSG( 1, (TEXT("Save Key failed (%d)\n"), GetLastError() ));
    return 0;
}

Visual C#

using System;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;                     //To use C Win32 functions

namespace CSharp_TouchScreen_Calibration
{
    public partial class Form1 : Form
    {
        [DllImport("coredll")]
        private static extern bool TouchCalibrate();      //import function from coredll

        [DllImport("coredll.dll", EntryPoint = "RegFlushKey", SetLastError = true)]
        public static extern uint RegFlushKey(uint hKey); //import function from coredll

        const uint HKEY_LOCAL_MACHINE = 0x80000002;

        public Form1()
        {
            InitializeComponent();
            touchCalibrate();// function will be called on Form Load
        }

        public void touchCalibrate()
        {
            TouchCalibrate();
            RegFlushKey(HKEY_LOCAL_MACHINE);
        }
    }
}

Note: To save registry from code use RegFlushKey function.