how to detect changes in text in a textfield

In C++, plain win32 programming (NO MFC) what message is sent to the textfield's callback if the textfield's text changes? Basically, i need to know how to detect changes in the text of a textfield. Please help.

If by textfield you mean an edit control, you want to handle the EN_CHANGE message.

Yes i meant an edit control, however the en_change message seems to be evoked only if i cut text from the edit control and not if i type inside the edit control during runtime.Any other suggestions?

Quote:

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Originally Posted by blastingblast

Yes i meant an edit control, however the en_change message seems to be evoked only if i cut text from the edit control and not if i type inside the edit control during runtime.Any other suggestions?

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Wrong! you should notificaiton also during text writing.

Cheers

No its still not working for me. This is my callback function for the edit control.What am i doing wrong? Is the en_change given to the parent or something? Here is the callback.

LRESULT CALLBACK NewProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{

switch(msg)
{
case WM_LBUTTONDBLCLK:
....
break;
case EN_CHANGE:
MessageBox(0,L"text has changed",L"text has changed",0);
break;
case WM_KEYUP:
....
break;
case WM_MOUSEMOVE:
........
break;

}

return CallWindowProc(OldProc ,hwnd,msg,wParam,lParam);
}

please mention if there is any way to capture changes in text through the edit controls callback

Code:

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case WM_COMMAND:
  switch (LOWORD(wParam))
  {
  case IDC_EDIT1: //Edit ID
    {
      if (HIWORD(wParam) == EN_CHANGE)
        ::MessageBox(0, "EN_CHANGE", "IDC_EDIT1", MB_OK);
      break;
    }
  }
  break;

---

Cheers

blastingblast, notice that the snippet golanshahar gave you show you an important detail about window messages.

It's not a coincidence that they start with something like WM_, EN_, SC_ and so on. The first letters of the symbol indicate what group it belong to i.e. whenever you see a message that not start with WM_ you can be sure it's not handled directly in the message switch and that you have to read more about it on MSDN... ;)

Yeah i finally got it. Thanks guys. I made 2 mistakes
1) tried to check en_change in edit control's callback and not the form's
2) tried checking en_change in the message rather than in the wparam

Though this is all i need, if there is a way to detect changes in the edit control's callback instead of the form's,let me know.

Thanks for all the help.