I want always inactive my windows application form

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VB

forms

I want always inactive my windows application form. like on screen keyboard
How can i do it

Posted 5-Jul-12 6:49am

AnuradhaJayalath

Updated 5-Jul-12 7:14am

Sergey Alexandrovich Kryukov

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[no name] 5-Jul-12 12:59pm

Please improve your question. This does not make any sense.

Sergey Alexandrovich Kryukov 5-Jul-12 13:23pm

I think I know what is it. This is a tricky situation, but I found the solution long time ago. Please see my answer.
--SA

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AnuradhaJayalath · Accepted Answer · 2012-07-06T20:56:00

C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace testt


{

    public partial class Form1 : Form
    {
        internal const int WS_EX_TOPMOST = 8;
        internal const int WS_EX_NOACTIVATE = 0x08000000;

        public Form1()
        {
            InitializeComponent();
        }
        protected override CreateParams CreateParams
        {
            get
            {
                CreateParams par = base.CreateParams;
                if (DesignMode) return par;
                par.ExStyle |= WS_EX_TOPMOST;
                par.ExStyle |= WS_EX_NOACTIVATE;
                return par;
            } //get CreateParams
        } //

        private void Form1_Load(object sender, EventArgs e)
        {

        }



    }
}

Sergey Alexandrovich Kryukov · Accepted Answer · 2012-07-05T07:22:00

The question is very unclear, but I think I can guess what's the problem. Indeed, with a virtual keyboard, when you click on a key, you need some target application to be active, so the simulated keyboard input would be dispatched to this application; at the same time, to be able to click a key on a virtual keyboard, you need to have it on top.

Therefore, we have some seemingly contradictory requirements for the virtual keyboard window; and this problem can be resolved by giving it pretty unusual combination of window parameters: it should be "always on top" and "no activate" at the same time. This is quite possible through overriding the virtual method System.Windows.Forms.Form.CreateParams:
http://msdn.microsoft.com/en-us/library/system.windows.forms.form.createparams.aspx[^].

I've shown a complete solution in my past answer:
Application focus getting and losing[^].

Please also see:
Creating a Virtual Keyboard[^].

—SA

I want always inactive my windows application form

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