Microsoft KB Archive/873429: Difference between revisions
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Revision as of 09:29, 21 July 2020
Article ID: 873429
Article Last Modified on 4/7/2006
APPLIES TO
- Microsoft .NET Framework 1.1
SYMPTOMS
When you create, modify, or remove a MenuItem property for a Multiple Document Interface (MDI) form in Microsoft .NET Framework 1.1 Service Pack 1 (SP1), a GDI resource leak occurs, and there is gradual increase in the application memory usage. This problem occurs when you create a WinForm application that uses an MDI form.
RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft .NET Framework 1.1 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name --------------------------------------------------------------------------- 23-Jul-2004 15:36 1.1.4322.1064 1,703,936 System.design.dll 23-Jul-2004 15:29 1.1.4322.1064 466,944 System.drawing.dll 23-Jul-2004 15:36 1.1.4322.1064 2,043,904 System.windows.forms.dll
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
MORE INFORMATION
Steps to reproduce the problem
Create a Visual Basic .NET MDI Form by using the following code.
Private Sub frmStart_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load Menu = MenuMainSetup() End Sub Public Function MenuMainSetup() As MainMenu ' Set up main menu with 1 item (Member) and two subitems (Open and Close Member) Dim mnuMain As New MainMenu Dim mitAdd As New MenuItem("Member") mitAdd.MergeType = MenuMerge.MergeItems mitAdd.MergeOrder = 1 Dim i As Integer = mnuMain.MenuItems.Add(mitAdd) mitAdd = New MenuItem("Open", New EventHandler(AddressOf zOpenChild)) mitAdd.MergeType = MenuMerge.MergeItems mitAdd.MergeOrder = 1 mnuMain.MenuItems(i).MenuItems.Add(mitAdd) mitAdd = New MenuItem("Close Member") mitAdd.MergeType = MenuMerge.MergeItems mitAdd.Visible = False mitAdd.MergeOrder = 2 mnuMain.MenuItems(i).MenuItems.Add(mitAdd) mitAdd = New MenuItem("Test GC", New EventHandler(AddressOf Test)) mitAdd.MergeType = MenuMerge.MergeItems mitAdd.MergeOrder = 3 mnuMain.MenuItems(i).MenuItems.Add(mitAdd) Return mnuMain End Function Public Function MenuSubSetup() As MainMenu ' Set up additional History menu item to go in Member menu Dim mnuMain As New MainMenu Dim mitAdd As New MenuItem("Member") mitAdd.MergeType = MenuMerge.MergeItems mitAdd.MergeOrder = 1 Dim i As Integer = mnuMain.MenuItems.Add(mitAdd) mitAdd = New MenuItem("History") mitAdd.MergeType = MenuMerge.MergeItems mitAdd.MergeOrder = 4 mnuMain.MenuItems(i).MenuItems.Add(mitAdd) mitAdd = Nothing Return mnuMain End Function Private Sub zOpenChild(ByVal sender As System.Object, ByVal e As System.EventArgs) ' Open our only child Dim f As New frmMemLeak f.MdiParent = Me f.Show() End Sub Private Sub Test(ByVal sender As System.Object, ByVal e As System.EventArgs) GC.Collect() GC.WaitForPendingFinalizers() End Sub
Create a Windows Form by using the following code.
Region " Windows Form Designer generated code " Public Class frmMemLeak : Inherits System.Windows.Forms.Form #Region " Windows Form Designer generated code " Public Sub New() MyBase.New() 'This call is required by the Windows Form Designer. InitializeComponent() 'Add any initialization after the InitializeComponent() call End Sub 'Form overrides dispose to clean up the component list. Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub 'Required by the Windows Form Designer Private components As System.ComponentModel.IContainer 'NOTE: The following procedure is required by the Windows Form Designer 'It can be modified using the Windows Form Designer. 'Do not modify it using the code editor. Private WithEvents cmdClose As System.Windows.Forms.Button <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.cmdClose = New System.Windows.Forms.Button Me.SuspendLayout() ' 'cmdClose ' Me.cmdClose.Location = New System.Drawing.Point(16, 16) Me.cmdClose.Name = "cmdClose" Me.cmdClose.TabIndex = 5 Me.cmdClose.Text = "Close" ' 'frmMemLeak ' Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(104, 61) Me.Controls.Add(Me.cmdClose) Me.Name = "frmMemLeak" Me.Text = "Leak" Me.ResumeLayout(False) End Sub #End Region Private Sub frmMemLeak_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load ' Disable the Close Member menu item MdiParent.Menu.MenuItems(0).MenuItems(1).Enabled = False End Sub Private Sub frmMemLeak_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Activated ' Add the History menu item to the Member menu Menu = CType(MdiParent, frmStart).MenuSubSetup End Sub Private Sub cmdClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdClose.Click MdiParent.Menu.MenuItems(0).MenuItems(1).Enabled = True Me.Close() End Sub End Class
- Run the application.
- In the application, click Member, and then click Open.
- In the application, click Member, and then click Test GC.
- Repeat steps 4 and 5 several times to create the leak.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
Keywords: kbbug kbfix kbqfe kbhotfixserver KB873429