Marks the beginning of a block of operations.

See Also | Example

Signature

object.StartUndoMark

Object

Document
The object or objects this method applies to.

Remarks

This method allows AutoCAD to set up the necessary environment so operations done between this call and a call to EndUndoMark can be treated as a group of operations.

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at webmaster@entercad.forsenergy.ru to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.