DM_ADDHISTORY

The ID of the dialog item for which the history item is added.

Pointer to a NULL-terminated string to be added to the history.

TRUE - data was successfully added.
FALSE - the specified dialog item doesn't have a history.

Control	Description
DI_EDIT	Text input string
DI_FIXEDIT	Fixed width text input string

The message applies only to the DI_EDIT and DI_FIXEDIT items with the DIF_HISTORY flag set. Also, if the DIF_MANUALADDHISTORY flag is not set, items will be added to the history automatically.

For example, in a calculator pressing Enter computes an expression. To save the entered expression to history after Enter was pressed it is necessary to get that string and add it to history:

FarDialogItem dialog[] = {
...
  { DI_EDIT, 10, 3, 49, 0, 1, (int)"foo_history", DIF_HISTORY|DIF_MANUALADDHISTORY, 0, "" },
...
};

LONG_PTR WINAPI FooDlgProc(HANDLE hDlg, int Msg, int Param1, LONG_PTR Param2)
{
...
    if (Msg == DM_KEY && Param2 == KEY_ENTER){
      Info.SendDlgMessage(hDlg, DM_GETTEXTPTR, 2, (LONG_PTR)Text);
      Info.SendDlgMessage(hDlg, DM_ADDHISTORY, 2, (LONG_PTR)Text);
      Res = AData.Parse(Text);
...
}