Edit control capture enter key

Question

I have an edit control

HWND hInput = CreateWindowEx(WS_EX_CLIENTEDGE, "EDIT", "", 
    WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_MULTILINE | ES_AUTOVSCROLL, 
    0, 0, 100, 100, hwnd, (HMENU)IDC_MAIN_INPUT, GetModuleHandle(NULL), NULL);

and a button:

HWND hSendButton = CreateWindowEx(WS_EX_CLIENTEDGE,"BUTTON","Send!",
        BS_DEFPUSHBUTTON | WS_VISIBLE | WS_CHILD,
        0,0,0,0,hwnd,(HMENU)IDC_MAIN_SENDBUTTON,GetModuleHandle(NULL),NULL);

Is there a way to see when the Enter key is pressed while typing in the edit control and send a message like the button was pressed?

I think that maybe

SendMessage(hwnd,WM_COMMAND,(WPARAM)IDC_MAIN_SENDBUTTON,LPARAM(0));

would do the job for sending the message but I'm still stuck at capturing the Enter key.

Thank you in advance.

Answer 1

You need to subclass the edit control and handle WM_KEYDOWN message. If it's the key you want, send the message, otherwise, let the default edit control procedure do its job.

The code would like this:

WNDPROC oldEditProc;

LRESULT CALLBACK subEditProc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
   switch (msg)
   {
    case WM_KEYDOWN:
         switch (wParam)
         {
          case VK_RETURN:
          //Do your stuff
              break;  //or return 0; if you don't want to pass it further to def proc
          //If not your key, skip to default:
         }
    default:
         return CallWindowProc(oldEditProc, wnd, msg, wParam, lParam);
   }
   return 0;
}

void somecreateeditproc()
{
  HWND hInput = CreateWindowEx(WS_EX_CLIENTEDGE, "EDIT", "", 
    WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_MULTILINE | ES_AUTOVSCROLL, 
    0, 0, 100, 100, hwnd, (HMENU)IDC_MAIN_INPUT, GetModuleHandle(NULL), NULL);

  oldEditProc = (WNDPROC)SetWindowLongPtr(hInput, GWLP_WNDPROC, (LONG_PTR)subEditProc);
}

Answer 2

I do it in dialog:

BOOL CDialogObject::PreTranslateMessage(MSG* pMsg)
{
    if (pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_RETURN)
    {
        SendMessage(WM_COMMAND, (WPARAM)IDC_BUTTON3,LPARAM(0));
    }
    return CDialog::PreTranslateMessage(pMsg);
}