EM_CANREDO Message

The EM_CANREDO message determines whether there are any actions in the control redo queue.

Syntax

To send this message, call the SendMessage function as follows.


lResult = SendMessage(
    // returns LRESULT in lResult
   (HWND) hWndControl,
    // handle to destination control
   (UINT) EM_CANREDO,
    // message ID
   (WPARAM) wParam,
    // = (WPARAM) () wParam;
   (LPARAM) lParam
    // = (LPARAM) () lParam;

);

Parameters

wParam
Not used; must be zero.
lParam
Not used; must be zero.

Return Value

If there are actions in the control redo queue, the return value is a nonzero value.
If the redo queue is empty, the return value is zero.

Remarks

To redo the most recent undo operation, send the EM_REDO message.

Message Information

Header Declared in Richedit.h
Minimum operating systems Windows 95 with Rich Edit 2.0 , Windows 98, Windows NT 4.0