# DN_EDITCHANGE

The DN_EDITCHANGE event is sent to the dialog callback function when an edit item has changed (for example, a character has been entered).

### Param1

The ID of the dialog item that has changed.

### Param2

Pointer to the FarDialogItem structure for the item that has changed.

### Return

In Dialog API 1.0, the return value is ignored, but to ensure compatibility with future versions of Dialog API, it is recommended to return:

- TRUE - to confirm the changes
- FALSE - to cancel the changes

### Controls

Control | Description
--- | ---
DI_COMBOBOX | Combined list
DI_EDIT | Text input line
DI_FIXEDIT | Fixed size text input line
DI_PSWEDIT | Password input line

### Remarks

1. The ability to change the state of the dialog item by changing the elements of the FarDialogItem structure is missing in Dialog API 1.0.
2. The DN_EDITCHANGE event will not be sent in a response to the following messages: DM_SETTEXTPTR and DM_SETTEXT.

### Example

    ...
    // show a copy of the entered data only for numbers
    if (Msg == DN_EDITCHANGE && Param1 == 2)
    {
      FarDialogItem *Item=(FarDialogItem *)Param2;
      int Len=strlen(Item->Data);
      for(int I=0; I < Len; ++I)
        if(!isdigit(Item->Data[I]))
          break;
      if(I == Len)
        return FALSE;
      Info.SendDlgMessage(hDlg, DM_SETTEXTPTR, 3, (LONG_PTR)Item->Data);
      return TRUE;
    }
    ...

See also:
DialogEx