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EM_GETSEL, WM_COPY brings no effect ?!

geniek asked
Last Modified: 2013-12-03
After I hook mouse events, I need to get selected text
in the active window.
hActive = GetActiveWindow();
  if ( hActive ) {
    msgResult = SendMessage ( hActive, WM_COPY , 0, 0 );
    .... // tried to copy selection to clipboard
or this way :
    result = SendMessage ( hActive, EM_GETSEL , NULL, NULL);
    ... // tried to get selection without envolving
        // a clipboard
Both of them do nothing ! :((
WM_COPY   doesn't change clipboard's content
EM_GETSEL brings 32 bits full of 0's
On the other hand
      SendMessage ( hActive, WM_CLOSE , 0, 0 );
closes the active window immediately (as it should)

What's the reason that active windows listen's to WM_CLOSE,
but ignores WM_COPY and EM_GETSEL ?
Thank you !
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