Re: [perl-win32-gui-users] Rich text field

[Octavian R. <ora...@gm...>]

Hi Sean,

Thank you for your help. I hope I will be able to do it.

Octavian

----- Original Message ----- 
From: "Sean Healy" <jal...@ho...>
To: <per...@li...>
Sent: Sunday, April 22, 2007 7:08 PM
Subject: Re: [perl-win32-gui-users] Rich text field


>> I have already tried it, but I cannot store more than 32 KB of text in a
>> Richedit field (using Win32::GUI::Richedit).
>> Those 32 kb of text takes around 48 kb of rich text, but it cannot store
>> more than that.
>>
>> I have tried using the Load() and Save() methods  and I have also tried
>> creating the rich text manually and storing it in the field, but it
>> doesn't
>> allow more than 32 kb of text.
>
> Look at the Win32::GUI::RidhEdit methods GetLimittext(), SetLimitText(),
> and LimiteText().
>
> An unfortunate misspelling on that last one; perhaps that can be fixed in
> a future version - as of 1.05 it's still LimiteText instead of LimitText
> Of course, both names may need to be kept for several versions, so as not
> to break any code that's using the misspelled version.
>
> Here's some more info on the text size limit:
>
> EM_LIMITTEXT Message
>
> The EM_LIMITTEXT message sets the text limit of an edit control. The text
> limit is the maximum amount of text, in TCHARs, that the user can type
> into the edit control. You can send this message to either an edit control
> or a rich edit control.
>
> For edit controls and Microsoft Rich Edit 1.0, bytes are used. For Rich
> Edit 2.0 and later, characters are used.
>
> Syntax
>
> To send this message, call the SendMessage function as follows. lResult =
> SendMessage(     // returns LRESULT in lResult
>    (HWND) hWndControl,     // handle to destination control
>    (UINT) EM_LIMITTEXT,     // message ID
>    (WPARAM) wParam,     // = (WPARAM) () wParam;
>    (LPARAM) lParam     // = 0; not used, must be zero
> );
>
>
> Parameters
> wParam
> Specifies the maximum number of TCHARs the user can enter. For ANSI text,
> this is the number of bytes; for Unicode text, this is the number of
> characters. This number does not include the terminating null character.
>
> Rich edit controls: If this parameter is zero, the text length is set to
> 64,000 characters.
>
> Edit controls on Windows NT/2000/XP: If this parameter is zero, the text
> length is set to 0x7FFFFFFE characters for single-line edit controls or -1
> for multiline edit controls.
>
> Edit controls on Windows 95/98/Me: If this parameter is zero, the text
> length is set to 0x7FFE characters for single-line edit controls or 0xFFFF
> for multiline edit controls.
> lParam
> This parameter is not used.
>
> Return Value
> This message does not return a value.
>
> Remarks
>
> The EM_LIMITTEXT message limits only the text the user can enter. It does
> not affect any text already in the edit control when the message is sent,
> nor does it affect the length of the text copied to the edit control by
> the WM_SETTEXT message. If an application uses the WM_SETTEXT message to
> place more text into an edit control than is specified in the EM_LIMITTEXT
> message, the user can edit the entire contents of the edit control.
>
> Before EM_LIMITTEXT is called, the default limit for the amount of text a
> user can enter in an edit control is 32,767 characters.
>
> Edit controls on Windows NT/2000/XP: For single-line edit controls, the
> text limit is either 0x7FFFFFFE bytes or the value of the wParam
> parameter, whichever is smaller. For multiline edit controls, this value
> is either -1 byte or the value of the wParam parameter, whichever is
> smaller.
>
> Edit controls on Windows 95/98/Me: For single-line edit controls, the text
> limit is either 0x7FFE bytes or the value of the wParam parameter,
> whichever is smaller. For multiline edit controls, this value is either
> 0xFFFF bytes or the value of the wParam parameter, whichever is smaller.
>
> Rich Edit: Supported in Rich Edit 1.0 and later. Use the message
> EM_EXLIMITTEXT for text length values greater than 64,000. For information
> about the compatibility of rich edit versions with the various system
> versions, see About Rich Edit Controls.
>
> Message InformationHeader Declared in Winuser.h, include Windows.h
> Minimum operating systems Windows 95, Windows NT 3.1
>
>
> See Also
> Edit Controls Overview, EM_EXLIMITTEXT, WM_SETTEXT
>
>
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