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EM_UNDO (Compact 2013)

  • Article

3/28/2014

This message reverses the effect of the last edit control operation.

Syntax

EM_UNDO 
    wParam = 0; 
    lParam = 0;

Parameters

  • wParam
    Not used; set to 0.
  • lParam
    Not used; set to 0.

Return Value

For a single-line edit control, the return value is always TRUE. For a multiline edit control, the return value is TRUE if the undo operation is successful, or FALSE if the undo operation fails.

Remarks

An undo operation can also be undone. For example, you can restore deleted text with the first EM_CANUNDO message, and remove the text again with a second EM_CANUNDO message as long as there is no intervening edit operation.

Requirements

Header

windows.h

See Also

Reference

Edit Box Messages
EM_CANUNDO