I need a function similar to the TextWidth method of report objects but which will work on a form. I need to break text up into lines for a form display similar to what we already do on a report. Unfortunately, forms don’t have a TextWidth method, at least no in A97.
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Form Equivalent of TextWidth (97 SR1)
Home » Forums » AskWoody support » Productivity software by function » MS Access and database help » Form Equivalent of TextWidth (97 SR1)
- This topic has 9 replies, 4 voices, and was last updated 22 years, 5 months ago.
AuthorTopicWScharlotte
AskWoody LoungerDecember 17, 2002 at 7:11 pm #380836Viewing 1 reply threadAuthorReplies-
WSHansV
AskWoody LoungerDecember 18, 2002 at 7:09 am #639457Charlotte, the attached module contains a function GetTextWidth. This function returns the text width (in twips) of the text in the active control. You can use it (for instance) in the OnChange event of a text box.
The code is derived from the code provided in MSKB article ACC: How to Limit Number of Characters to Size of Text Box.
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WScharlotte
AskWoody LoungerDecember 18, 2002 at 1:10 pm #639505Thanks, Hans. I had already looked at that code in the MSKB before I posted. The problem with it is that it assumes the control will have the focus and gets the hWnd for that control. What I’m doing is filling in a *series* of unbound form controls with text that may be chunks of a string too big to fit into a single control from a single record or may be a series of strings from sequential records. For sufficient reasons the controls are not necessarily the same width. I adapted a method from the Access Developers Handbook for A97 used for sizing controls to fit their contents. I just used the relevant portion to determine the length of the text in twips based on the font size and compared it to the width of the control in twips. And of course it has to be parsed by word so that no word gets broken at the end of the available space.
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WSHansV
AskWoody LoungerDecember 18, 2002 at 1:28 pm #639510Charlotte,
The MSKB code needs the control to have focus at two places:
- To get the current text in the control. Since you are breaking up an existent string, you don’t need that; you can pass strings as a parameter instead.
- To get the window handle of the control. To get around this, you could fill an array with the hWnd’s of the controls in OnLoad of the form, and pass the appropriate hWnd as a parameter.
The function could look like this:
Public Function GetTextWidth(strVal As String, hWnd As Long)
‘ Get text width of string in control in twips
Dim hDC As Long
Dim lpSize As Size‘ Get device context of control
hDC = GetDC(hWnd)‘ Compute the width of the text
GetTextExtentPoint hDC, strVal, Len(strVal), lpSize
ReleaseDC hWnd, hDC
ConvertPixelsToTwips lpSize.cx, lpSize.cy
GetTextWidth = lpSize.cx
End Function -
WScharlotte
AskWoody Lounger -
WSpatt
AskWoody Lounger -
WScharlotte
AskWoody Lounger -
WScharlotte
AskWoody LoungerDecember 24, 2002 at 1:18 pm #640646Here’s the code I used. It definitely works with Access 97 but I would be cautious about recommending it for later versions due to the highly explicit declarations from the Msaccess executable itself. The advantage to it is that the controls don’t ever need to get the focus in order to determine the width.
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WSpatt
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