Get the height in pixels of the text in a text box - HardCore?

I Filled a TextBox with a text from a text file... no I want to size the height of the TextBox to the Height of the text.

can It be done? API? Any Ideas?

Thanks in advanced.

Make sure the forms font is set the same as the textbox and do:

Code:

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MsgBox Form1.TextHeight(Text1.Text)

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TextHeight can be used if the string isn't a multiline string. If it is you can still use TextHeight * NumberOfLines. But if the textbox is wordwrapping it might be hard to know the exact number of lines. In that case you can use the DrawText API. Which also could be used to for example make a label autosize vertically.

VB Code:

Private Declare Function DrawText _
 Lib "user32.dll" Alias "DrawTextA" ( _
 ByVal hdc As Long, _
 ByVal lpStr As String, _
 ByVal nCount As Long, _
 ByRef lpRect As RECT, _
 ByVal wFormat As Long) As Long
 
Private Const DT_CALCRECT As Long = &H400
 
Private Type RECT
    Left As Long
    Top As Long
    Right As Long
    Bottom As Long
End Type
 
Private Sub AdjustHeight(txtBox As TextBox)
    Dim sText As String
    Dim r As RECT
    Dim nHeight As Long
    
    'adjust the scale mode for easier calculations
    Me.ScaleMode = vbPixels
    r.Right = txtBox.Width - 4 ' -4 px for the border, assumes 3d style is used
    sText = txtBox.Text
    nHeight = DrawText(Me.hdc, sText, Len(sText), r, DT_CALCRECT)
    If nHeight Then
        txtBox.Height = nHeight + 6
    End If
End Sub

This function will wrap the text and use .TEXTHEIGHT.

Code:

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frmTeaMark.TextHeight(Wrap_Text(txtData.Text, txtData.Width))

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Code:

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Private Function Wrap_Text(ByVal strText As String, lngWidth As Long) As String

Dim x As Long, y As Long, z As Long, s1 As String

s1 = ""

Do While strText <> ""
    For x = 1 To Len(strText)
        Select Case Asc(Mid$(strText, x, 1))
            Case 32
                y = x
            Case 13
                Debug.Print "Got 13"
            Case 10
                Debug.Print "Got 10"
                z = x
        End Select
        If z <> 0 Then
            Debug.Print Left(strText, z - 2)
            If s1 <> "" Then s1 = s1 & vbCrLf
            s1 = s1 & Left(strText, z - 2)
            strText = Mid(strText, z + 1)
            z = 0
            Exit For
        End If
        If frmTeaMark.TextWidth(Left(strText, x)) > lngWidth Then
            Debug.Print Left(strText, y - 1)
            If s1 <> "" Then s1 = s1 & vbCrLf
            s1 = s1 & Left(strText, y - 1)
            strText = Mid(strText, y + 1)
            Exit For
        End If
        If x = Len(strText) Then
            Debug.Print strText
            If s1 <> "" Then s1 = s1 & vbCrLf
            s1 = s1 & strText
            strText = ""
            Exit For
        End If
    Next x
Loop

Wrap_Text = s1

End Function

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Quote:

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Originally Posted by szlamany

This function will wrap the text and use .TEXTHEIGHT.

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All that is fine but a textbox automatically wraps text if you don't show the horizontal scrollbar and in that case the DrawText is the way to go since it does the calculation for you. Less code and faster result.

Quote:

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Originally Posted by Joacim Andersson

All that is fine but a textbox automatically wraps text if you don't show the horizontal scrollbar and in that case the DrawText is the way to go since it does the calculation for you. Less code and faster result.

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We end up having to store the data in a SQL table - and also having to print it - so wrapping the text and inserting those "assumed" cr/lf's was necessary.

Unfortunately you cannot stop a textbox at a certain height - so when the user leaves the textbox we needed to make sure they didn't put too much in the textbox to fit on the report card...

if you dont want to do those other ideas,(they scare me) lol
you can use currentx and currenty to calculate it
(currentx and currenty are the co-ordinates of the next print statement on a form/picturebox)

Code:

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string = textxox.text

for x = 1 to len(string)
if currenty > (maximum width you want it to go to) then
print mid(string,x,1)
else
print mid(string, x,1);
end if
next x

textbox .height = currentx + (a bit so its not cramped)

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the only problem with that is it does not correct for words staying together(if it even matters)
just make sure the form and textbox text settings are the same and you might have to change it slightly to give more extra