ITextDocument::Undo method (tom.h)

Performs a specified number of undo operations.

Syntax

HRESULT Undo(
  long Count,
  long *pCount
);

Parameters

Count

Type: long

The specified number of undo operations. If the value of this parameter is tomFalse, undo processing is suspended. If this parameter is tomTrue, undo processing is restored.

pCount

Type: long*

The actual count of undo operations performed. This parameter can be NULL.

Return value

Type: HRESULT

If all of the Count undo operations were performed, it returns S_OK. If the method fails, it returns S_FALSE, indicating that less than Count undo operations were performed. For more information on COM error codes, see Error Handling in COM.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	tom.h
DLL	Msftedit.dll

See also

Conceptual

ITextDocument

Redo

Reference

Text Object Model