[Mono-bugs] [Bug 516735] New: Application.DoEvents does not call Application.FilterMessage like Application.Run does

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Fri Jun 26 04:51:58 EDT 2009


           Summary: Application.DoEvents does not call
                    Application.FilterMessage like Application.Run does
    Classification: Mono
           Product: Mono: Class Libraries
           Version: SVN
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: skolima at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; pl; rv:
Gecko/2009060215 Firefox/3.0.11 (.NET CLR 3.5.30729)

Application.DoEvents pumps messages through XplatUI, but does not call
Application.FilterMessage thus not feeding Messages to registered

Reproducible: Always

Steps to Reproduce:
1. Compile (gmcs -t:exe -r:System.Windows.Forms Test.cs) and run the following

using System;
using System.Windows.Forms;

namespace ConsoleApplication1
    class Program : IMessageFilter
        static void Main()
            Application.AddMessageFilter(new Program());
            var form = new Form();



        public bool PreFilterMessage(ref Message m)
            Console.WriteLine("Message [{0}] [{1}]", m.Msg,
(Keys)m.WParam.ToInt32() & Keys.KeyCode);
            return false;

Actual Results:  
A window opens, but no events are logged onto the console.

Expected Results:  
Multiple events are logged (as would happen if the while(true) loop was
replaced with the commented out Application.Run(form);

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