Open And Find Another Control of a Form

I have a Window Applicattion, i am opening another application Inside that, Using Below Code.

ProcessStartInfo startInfo = new ProcessStartInfo();
        startInfo.FileName = @"C:\Data.exe";
            Process p = Process.Start(startInfo);
            Thread.Sleep(500); // Allow the process to open it's window
           SetParent(p.MainWindowHandle, this.Handle);

Here File Is Opening, now i want to Find TextBox Of that Exe file, and write Some Data, any help will be Highly appreciate.

Hi Ramendra Kumar,

I did it for you, go through it can can achieve the same in different way.created two exe refer below code, its hacky way

Its my exe 1

using System;

using System.Diagnostics;

using System.Runtime.InteropServices;

using System.Threading;

using System.Windows.Forms;

namespace Control_Exe2_from_Exe1

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

[DllImport("user32.dll")]

public static extern int SendMessage(int hWnd, int msg, int wParam, [MarshalAs(UnmanagedType.LPStr)] string lParam);

private void Form1_Load(object sender, EventArgs e)

{

const int WM_SETTEXT = 0x0C;

ProcessStartInfo startInfo = new ProcessStartInfo();

startInfo.FileName = @"U:\uib11168\Exe2\Exe2\bin\Debug\Exe2.exe";

Process p = Process.Start(startInfo);

Thread.Sleep(500); // Allow the process to open it's window

string textToSendToFile = "Input here your text";

SendMessage((int)p.MainWindowHandle, WM_SETTEXT, 0, textToSendToFile);

}

--Exe 2

using System;

using System.Windows.Forms;

namespace Exe2

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void Form1_TextChanged(object sender, EventArgs e)

{

MessageBox.Show("text changed");

}

System.Timers.Timer t = new System.Timers.Timer(100);

private void Form1_Load(object sender, EventArgs e)

{

t.Elapsed += T_Elapsed;

t.Enabled = true;

//MessageBox.Show("timer enabled true");

}

private void T_Elapsed(object sender, System.Timers.ElapsedEventArgs e)

{

if(this.Text!= "Form1")

{

//MessageBox.Show("text changed");

textBox1.Text = this.Text;

this.Text = "set your form title here";

}

4 Replies

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Ramendra Kumar7y ago
Dear,
Rajanikant First Of all thx for your kind support, and its working also, but in my case i dont have access to exe1 code file so i can't write anything there, i just want to find control off that form and fill the textboxes with my data, something like screen scraping in WebForms.
Rajanikant Hawaldar7y ago
Hi Ramendra Kumar,

I did it for you, go through it can can achieve the same in different way.created two exe refer below code, its hacky way

Its my exe 1

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;
namespace Control_Exe2_from_Exe1
{
   public partial class Form1 : Form
   {
      public Form1()
      {
         InitializeComponent();
      }
      [DllImport("user32.dll")]
      public static extern int SendMessage(int hWnd, int msg, int wParam,       [MarshalAs(UnmanagedType.LPStr)] string lParam);
      private void Form1_Load(object sender, EventArgs e)
      {
         const int WM_SETTEXT = 0x0C;
         ProcessStartInfo startInfo = new ProcessStartInfo();
         startInfo.FileName = @"U:\uib11168\Exe2\Exe2\bin\Debug\Exe2.exe";
         Process p = Process.Start(startInfo);
         Thread.Sleep(500); // Allow the process to open it's window
         string textToSendToFile = "Input here your text";
         SendMessage((int)p.MainWindowHandle, WM_SETTEXT, 0, textToSendToFile);
      }
   }
}

--Exe 2

using System;
using System.Windows.Forms;
namespace Exe2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_TextChanged(object sender, EventArgs e)
{
MessageBox.Show("text changed");
}
System.Timers.Timer t = new System.Timers.Timer(100);

private void Form1_Load(object sender, EventArgs e)
{
t.Elapsed += T_Elapsed;
t.Enabled = true;
//MessageBox.Show("timer enabled true");
}
private void T_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
if(this.Text!= "Form1")
{
//MessageBox.Show("text changed");
textBox1.Text = this.Text;
this.Text = "set your form title here";
}
}
}
}
Ramendra Kumar7y ago
Exe
Sivakumar Koneti7y ago
https://stackoverflow.com/questions/4822980/how-to-access-a-form-control-for-another-form