How To Adjust RowHeight of MSFlexGrid to Accommodate WordWrap

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Article ID: 178127 - View products that this article applies to.
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The MSFlexGrid included with Visual Basic 5.0 has a WordWrap property that allows the user to determine whether text in a cell of the MSFlexGrid should be continued on a new line in the same cell if one or more words extends beyond the edge of the cell. However, the MSFlexGrid does not automatically adjust the RowHeight to accommodate the extra lines. This article illustrates how you can adjust the RowHeight of cells in the MSFlexGrid to accommodate text that wraps.


This example uses the SendMessage API function with the EM_GETLINECOUNT constant as an argument. When you use the EM_GETLINECOUNT message, SendMessage returns the number of lines an edit control (or TextBox) is currently displaying. This does not work directly on the MSFlexGrid because the MSFlexGrid is not intrinsic to Windows, as is the edit box. However, by using an edit box with the MSFlexGrid, you can use SendMessage to extend the functionality of the MSFlexGrid.

Step-by-Step Example

  1. Create a new Standard EXE project.Form1 is created by default.
  2. Click Components on the Project menu and check "Microsoft FlexGrid Control 5.0."
  3. Add a Data control, a TextBox, an MSFlexGrid control and a CommandButton to the default form.
  4. Set the following properties for the controls on the default form:
       Name               Property                       Value
       ----               --------                       -----
       Data1              DatabaseName                   NWIND.MDB
       Data1              RecordSource                   Employees
       MSFlexGrid1        AllowUserResizing              3 - flexResizeBoth
       MSFlexGrid1        DataSource                     Data1
       MSFlexGrid1        WordWrap                       True
       Text1              MultiLine                      True
       Text1              Visible                        False
    NOTE: The database NWIND.MDB is installed into your Visual Basic directory.
  5. Add the following code to the code window of the default form:
          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 EM_GETLINECOUNT = &HBA
          Private Sub Command1_Click()
             Dim ColLoop As Long
             Dim RowLoop As Long
             'Turn off redrawing to avoid flickering
             MSFlexGrid1.Redraw = False
             For ColLoop = 0 To MSFlexGrid1.Cols - 1
                MSFlexGrid1.ColWidth(ColLoop) = 2500
                For RowLoop = 0 To MSFlexGrid1.Rows - 1
                   ReSizeCellHeight RowLoop, ColLoop
                Next RowLoop
             Next ColLoop
             'Turn redrawing back on
             MSFlexGrid1.Redraw = True
          End Sub
          Public Sub ReSizeCellHeight(MyRow As Long, MyCol As Long)
             Dim LinesOfText As Long
             Dim HeightOfLine As Long
             'Set MSFlexGrid to appropriate Cell
             MSFlexGrid1.Row = MyRow
             MSFlexGrid1.Col = MyCol
             'Set textbox width to match current width of selected cell
             Text1.Width = MSFlexGrid1.ColWidth(MyCol)
             'Set font info of textbox to match FlexGrid control
             Text1.Font.Name = MSFlexGrid1.Font.Name
             Text1.Font.Size = MSFlexGrid1.Font.Size
             Text1.Font.Bold = MSFlexGrid1.Font.Bold
             Text1.Font.Italic = MSFlexGrid1.Font.Italic
             Text1.Font.Strikethrough = MSFlexGrid1.Font.Strikethrough
             Text1.Font.Underline = MSFlexGrid1.Font.Underline
             'Set font info of form to match FlexGrid control
             Me.Font.Name = MSFlexGrid1.Font.Name
             Me.Font.Size = MSFlexGrid1.Font.Size
             Me.Font.Bold = MSFlexGrid1.Font.Bold
             Me.Font.Italic = MSFlexGrid1.Font.Italic
             Me.Font.Strikethrough = MSFlexGrid1.Font.Strikethrough
             Me.Font.Underline = MSFlexGrid1.Font.Underline
             'Put the text from the selected cell into the textbox
             Text1.Text = MSFlexGrid1.Text
             'Get the height of the text in the textbox
             HeightOfLine = Me.TextHeight(Text1.Text)
             'Call API to determine how many lines of text are in text box
             LinesOfText = SendMessage(Text1.hWnd, EM_GETLINECOUNT, 0&, 0&)
             'Check to see if row is not tall enough
             If MSFlexGrid1.RowHeight(MyRow) < (LinesOfText*HeightOfLine) Then
                'Adjust the RowHeight based on the number of lines in textbox
                MSFlexGrid1.RowHeight(MyRow) = LinesOfText * HeightOfLine
             End If
          End Sub
  6. Press the F5 key to run the project.
  7. Click Command1.

    RESULT: Before clicking the button, all cells of the MSFlexGrid are the default size. Clicking the button runs code that processes each cell of the MSFlexGrid and increases the cell's height if necessary to display all of it's text. In this example, this is most apparent in the "Notes" column of the MSFlexGrid control.

    NOTE: In order to receive the best results, you may also need to adjust the ColWidth property.


Article ID: 178127 - Last Review: June 29, 2004 - Revision: 1.3
  • 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
kbhowto kbcontrol KB178127

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