Re: ListBox with ctrl-c and other ctrl keys.

TonyG <>
Tue, 31 Mar 2009 21:32:20 -0500
I still have one problem.

I successfully implemented OnKeyDown to capture ctrl-c and I
successfully implemented the clipboard stuff.

What I want to do is to disable the default mechanism. In a ListBox when
you type ctrl-any letter. Whatever you have selected is unselected and a
new selection is made of the top most line that begins with whatever
ctrl-letter you are using. I don't want that. I want to disable that

How do I do that?

FYI: here is my OnKeyDown function in my subclassed ListBox. Instead of
handling the clipboard in the subclass, I chose to pass it to the dialog
to deal with. I have a reason to do that.

void ZScListBox::OnKeyDown(
UINT nChar,
UINT nRepCnt,
UINT nFlags
    case 65: // a
       // check if ctrl is depressed
       if (0x8000 == (GetKeyState(VK_CONTROL) & 0x8000))
          // ctrl-a is pressed

          // tell the parent
          // send the ID of the list box
          GetParent()->SendMessage(SC__MESSAGE_LIST_BOX_CTRL_A, 0,

    case 67: // c
       // check if ctrl is depressed
       if (0x8000 == (GetKeyState(VK_CONTROL) & 0x8000))
          // ctrl-c is pressed

          // tell the parent
          // send the ID of the list box
          GetParent()->SendMessage(SC__MESSAGE_LIST_BOX_CTRL_C, 0,

    case 17: // ctrl
       // call base class
       CListBox::OnKeyDown(nChar, nRepCnt, nFlags);

Ajay wrote:

On Mar 31, 8:39 am, TonyG <> wrote:

I have a many line owner-draw list box in my program. I use the
"Extended" selection method that allows lines to be highlighted.

How do I trap the ctrl-c key so that I can copy the selected lines to
the paste buffer?

Once I have text, how do I put the text into the paste buffer?

You should be able to use OnKeyDown of your control to trap it. Also
to put the data on clipboard, take a look at SetClipboardData.


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