Microsoft KB Archive/175533

= BUG: Toolbar Does Not Wrap Correctly =

Article ID: 175533

Article Last Modified on 6/24/2004

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APPLIES TO


 * Microsoft Visual Basic 5.0 Professional Edition
 * Microsoft Visual Basic 6.0 Professional Edition
 * Microsoft Visual Basic 5.0 Enterprise Edition
 * Microsoft Visual Basic 6.0 Enterprise Edition
 * Microsoft Visual Basic 4.0 Professional Edition
 * Microsoft Visual Basic 4.0 32-Bit Enterprise Edition

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This article was previously published under Q175533



SYMPTOMS
When you change the number of visible buttons on a Toolbar, the Toolbar does not wrap when it should. This problem may occur when adding, removing, or changing the Visible property of buttons on the Toolbar.



RESOLUTION
The work around is to either resize the form or use SendMessage(Toolbar1.hwnd, WM_SIZE, 0, 0) to force resizing of the Toolbar.



STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.



MORE INFORMATION
When using the Add method of the Buttons Collections, wrapping will not occur with the first Button that won't fit but will occur when a subsequent Button is added. Conversely, when using the Remove method, wrapping occurs one Button too soon so that when only one Button remains on the last row, the Toolbar unwraps, placing this last Button off the Toolbar. Changing the Visible property of Buttons never triggers wrapping. The example that follows demonstrates the problem.

Steps to Reproduce Behavior
 Create a new Visual Basic project. Click Components on the Project menu and check "Microsoft Windows Common Controls 5.0." Add two CommandButtons and a Toolbar control to Form1.  Paste the following code into the form's General Declarations section: Option Explicit

Private Declare Function SendMessage Lib "user32" Alias _ "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, _     ByVal wParam As Long, lParam As Any) As Long

Const WM_SIZE = &H5

Private Sub Command1_Click Dim I As Integer   ' Make all Buttons visible For I = 1 To Toolbar1.Buttons.Count Toolbar1.Buttons(I).Visible = True Next I     End Sub

Private Sub Command2_Click Dim RetVal As Long ' If Internet Explorer 4.0 is installed, you must repeat the ' following SendMessage line, so that the message is sent twice. RetVal = SendMessage(Toolbar1.hwnd, WM_SIZE, 0, 0) ' Wrap ' If placing another control on the Toolbar, set it's Left and ZOrder ' properties after the SendMessage. For a demonstration of this, ' see "Example" under "Toolbar Control" in On Line Help. End Sub

Private Sub Form_Load Dim I As Integer Dim btnX As Button Me.Width = 4200    ' So that 15 buttons won't fit Me.Height = 3000   ' So that Command buttons will fit Toolbar1.Wrappable = True For I = 1 To 15    ' Add more buttons than will fit Set btnX = Toolbar1.Buttons.Add(,, , tbrDefault) If I > 5 Then btnX.Visible = False ' Start with 5 buttons If I Mod 5 = 0 Then ' Make Groups of 5 (Optional) Set btnX = Toolbar1.Buttons.Add(,, , tbrSeparator) End If     Next I      ' Place and size Command buttons so that Toolbar1 has room to wrap With Command1 .Width = 2000 .Caption = "Add Buttons" .Left = 200 .Top = (Toolbar1.Height * 2) + 250 End With With Command2 .Width = 2000 .Caption = "Wrap Toolbar" .Left = 200 .Top = Command1.Top + Command1.Height + 15 End With End Sub  Run the project. You will see five blank buttons on the Toolbar. Click on "Add Buttons." Ten more buttons are made visible but not all will fit. Note that the ToolBar does not wrap.</li> Click on "Wrap Toolbar." Note that the Toolbar now wraps.</li></ol>

Making more buttons visible than will fit on the Toolbar should cause it to wrap, but the code to do this is not triggered. Resizing the Form will trigger this code, but using the SendMessage API is a better solution because it also works on a Maximized Form.

Additional query words: kbVBp kbdsd kbDSupport kbVBp400bug kbVBp500bug kbVBp600bug kbControl

Keywords: kbbug KB175533

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