edit control text buffer

This is a discussion on edit control text buffer within the Windows Programming forums, part of the Platform Specific Boards category; hi, I have an multi-line edit control in a modeless dlg. I need to change the text that is displayed ...

  1. #1
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    edit control text buffer

    hi,

    I have an multi-line edit control in a modeless dlg. I need to change the text that is displayed with SendDlgItemMessage because it looks like this:

    /************************************************** ******************
    |
    |A.) some text that is a choice for a test answer
    |and it is aligned all the way to the left after a line break
    |
    ************************************************** ******************/

    and I want it to look like this:

    /************************************************** *****************
    |
    |B.) after some text and the edit control line break I want
    | it to look like this, not all the way to the left.
    |
    ************************************************** *****************/
    NOTE: The "|" symbol used above is to show the edit ctrl's left edge, when I previewed the post it aligned the post just like my edit ctrl does! Even so cboard's edit ctrl only allowed one space. I want the 'i' in it to line up under the 'a' in after.

    I've been trying to figure out how to get a handle to the edit control's text buffer heap addr. no luck so far. The msdn site gives thorough info but it is dated 1992 and doesn't seem to work for me. I'm using XP and would like to have the edit ctrl as read-only but will use read/write to make buffer change and switch to ro after if possible. Can I reprogram the line-break code??? subclass?

    Thanks for any help/suggestions

  2. #2
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    first off, use the word [code], and end the code section with [/code] (but not italicized). It'll indent things correctly.

    Second, I think the function is GetDlgItem(). It returns a handle to a dialog item, and as long as you have an UINT identifier (that is global) you can get a handle to the text window through any part of the program.

  3. #3
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    thanks

    Thanks scwizzo, I've now read kermi3's sticky, won't happen again.

    Doesn't GetDlgItem just return a handle to the edit control? I want to look at the text buffer that Windows allocates for the ec so that I can view the data before it is sent to the
    ec by a call to SendMessage, SendDlgItemMessage...

    Supposedly, since 32 bit Windows, this buffer is allocated in apps local heap as far as I can tell. I've been trying EM_GETHANDLE and get back non-zero, non-neg values in the eax register but they dont seem to point to any valid memory area. I'm going to change my ec to rw and see it that makes a diff.

    I really apprec. your help!

    ~jim

  4. #4
    train spotter
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    You could try.......

    getting the text with GetDlgItemText()

    or

    process the parents EN_CHANGE msgs

    then

    set the TAB with EM_SETTABSTOPS
    "Man alone suffers so excruciatingly in the world that he was compelled to invent laughter."
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  5. #5
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    Quote Originally Posted by scurvydog View Post
    Doesn't GetDlgItem just return a handle to the edit control?
    Yep, but if you want to use GetDlgItemText like novacain said you'll need a handle to the dialog that contains the edit text box.(unless you have a global handle to it or something).

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