Measuring the Graphical Width of a String

I'm trying to develop a textbox that expands as the text in it wraps, but I am having difficulty figuring out a generic method for identifying the graphical width of a string without knowing the font that is being used.

I have read about the ClientDC.GetTextExtent method in C++. Is there something like that in VB? What properties should I be looking at?

I appreciate everyones' assistance.

Regards,
New2VB

Hi,

Im not really sure if this will be of any help...but thought I'd tell u anyway.

There's an API GetTetExtentPoint - but I couldn't get any info on what it actually does.

hope this is what u were looking for.

Yep, that's the one:

Code:

---

'BAS Module

Public Declare Function GetTextExtentPoint Lib "gdi32" Alias "GetTextExtentPointA" (ByVal hdc As Long, ByVal lpszString As String, ByVal cbString As Long, lpSize As txtSize) As Long

Type TxtSize
    x as Long
    y as Long
End Type

'Form Module

'Me.ScaleMode = 3 Or Use Screen.TwipsPerPixel
...
Dim Size as txtSize
Dim Str as String
Str = Text1.Text
Call FindTextLength(Me.hDC, Str, LenB(Str), Size)

Text1.Width = Size.y

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I think that'll do the trick.

I haven't tested it or anything so you might need to tweak it a bit.

Hope it helps,

Me

Code:

---

Private Sub Text1_Change()
    Dim MinWidth As Long
   
    MinWidth = 256
   
    Text1.Width = TextWidth(Text1.Text) + MinWidth
End Sub

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