EM_STOPGROUPTYPING

[This is preliminary documentation and subject to change.]

Rich Edit 2.0 and later: Send an EM_STOPGROUPTYPING message to a rich edit control to stop the control from collecting additional typing actions into the current undo action. The control stores the next typing action, if any, into a new action in the undo queue.

Rich Edit 1.0: This message is not supported.

EM_GETUNDONAME 
wParam = 0;    // not used; must be zero 
lParam = 0 ;   // not used; must be zero 
 

Parameters

The parameters are not used; they must be zero.

Return Values

The return value is zero. The message cannot fail.

Remarks

A rich edit control groups consecutive typing actions, including characters deleted by using the backspace key, into a single undo action until one of the following events occurs:

• The control receives an EM_STOPGROUPTYPING message.
• The control loses focus.
• The user moves the current selection, either by using the arrow keys or by clicking the mouse.
• The user presses the delete key.
• The user performs any other action that is not typing, such as a paste operation.

You can send the EM_STOPGROUPTYPING message to break consecutive typing actions into smaller undo groups. For example, you could send EM_STOPGROUPTYPING after each character or at each word break.

QuickInfo

  Windows NT: Requires version 4.0 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in richedit.h.

See Also

Rich Edit Controls Overview, Rich Edit Messages, EM_UNDO