events in controls

[purusingh]

I made a dialog IDD_MY_DIALOG and associate procedure MY_DlgProc(....).
I have created a edit control IDC_EDIT1 and a button IDC_BUTTON1.

I can trap the clickevent of IDC_BUTTON in MY_DlgProc(....). as below

MY_DlgProc(....).
{
switch(msg)
{
case WM_CPMMAND:
switch(wParam)
{
case IDC_BUTTON1:
...........
}
}
}

Now How Can I trap the (EN_CHANGE) change event of IDC_EDIT1 in MY_DlgProc(....).

[prog_tom]

all you have to do is


switch(msg)
{
case WM_COMMAND:
switch(LOWORD(wParam)){
case THEBUTTON:
switch(HIWORD(wParam)){
case EN_CHANGE:

//do stuff
break
}
break
}
break
}


hope that helps

[purusingh]

Thank U very much.It would be very greatful if U tell me when to use loword and when to use hiword.

[prog_tom]

Please don't thank me. I'm not all that good, afterall, I'm a 13 year old beginner. I still have to consult with other forum members on some questions, such Parksie and other guys.

Do you have AIM, or Yahoo Messenger?

[abdul]

Originally posted by purusingh
Thank U very much.It would be very greatful if U tell me when to use loword and when to use hiword.

It's different for different messages. You can always consult MSDN for reference on a certain message. It'll tell you wether a message is stand-alone or it's sent through LPARAM or WPARAM parameters. It'll also tell you what type of information LOWORD and HIWORD of LPARAM and WPARAM have.
http://msdn.microsoft.com/library

[prog_tom]

nice website you got there, abdul.
I see, it's still a layout?
http://www.hinst.net/~tom/sckoolboyhumor/

[purusingh]

I got how to trap EV_CHANGE.Not I want to trap after finishing typing into edit box and pressing enter(validate event in vb).

[CornedBee]

BTW prog_tom, your code is faulty.

It should be:

switch(msg)
{
  // ...
case WM_COMMAND:
  switch(LOWORD(wParam))
  {
  case THEBUTTON:
    // handle button commands, only realistic are BN_CLICKED and
    // BN_DBLCLCK, those are often handled together
    break;
  case THEEDIT:
    // since an edit control may send many messages, we should
    // do a switch on the actual command too
    switch(HIWORD(wParam))
    {
    case EN_CHANGE:
      // ...
      break;
    }
    break;
  }
  break;
}

In WM_COMMAND, the arguments are used like this:
lParam = HWND of control
LOWORD(wParam) = ID of control
HIWORD(wParam) = actual command id