Capture Popup-Window from other program RRS feed

  • Question

  • Hey,

    I'm running an *.exe on my Windows Server in the background. Sometimes the program prompts some kind of MessageBox, which prevents my program from running.

    Now it came in my mind, to write a Little program, which checks, if there that messageBox is shown up and Closes that window.

    Does anybody have an idea, how to handle such a situation in c#.net?

    Wednesday, April 25, 2018 6:47 AM

All replies

  • Hi ed912211,

    Thank you for posting here.

    For your question, please try the code below.

    using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Runtime.InteropServices; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace WindowsForms { public partial class capture_popup_window : Form { public capture_popup_window() { InitializeComponent(); } [DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)] private extern static IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", CharSet = CharSet.Auto)] public static extern int PostMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam); public const int WM_CLOSE = 0x10; private void StartKiller() { timer1.Interval = 1000;

    timer1.Tick += new EventHandler(timer1_Tick); timer1.Start(); } private void timer1_Tick(object sender, EventArgs e) { KillMessageBox(); //((Timer)sender).Stop(); } private void KillMessageBox() { //It used to search the pop up MessageBox, please note the Message is the MessageBox caption. IntPtr ptr = FindWindow(null, "Message"); if (ptr != IntPtr.Zero) { //find the window and close it PostMessage(ptr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero); } } private void button1_Click(object sender, EventArgs e) { StartKiller(); } } }

    I create a winform application to show the MessageBox to test the example to close the MessageBox. I use a gif to show the result.

    Please note that, the code below, you need to input the caption of MessageBox which pop up.

     //It used to search the pop up MessageBox, please note the Message is the MessageBox caption. 
                IntPtr ptr = FindWindow(null, "Message"); //The Message if the caption of my MessageBox.

    Best Regards,


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    Thursday, April 26, 2018 7:30 AM