The STGM constants are flags that indicate conditions for creating and deleting the object and access modes for the object Maps to Windows' STGM Constants.

Namespace: ShellBoost.Core.WindowsShell
Assembly: ShellBoost.Core (in ShellBoost.Core.dll) Version: 1.8.3.0

Syntax

Copy

[FlagsAttribute]
public enum STGM

Members

Member name	Value	Description
STGM_DIRECT	0	Indicates that, in direct mode, each change to a storage or stream element is written as it occurs. This is the default if neither STGM_DIRECT nor STGM_TRANSACTED is specified.
STGM_TRANSACTED	65536	Indicates that, in transacted mode, changes are buffered and written only if an explicit commit operation is called.
STGM_SIMPLE	134217728	Provides a faster implementation of a compound file in a limited, but frequently used, case
STGM_READ	0	Indicates that the object is read-only, meaning that modifications cannot be made.
STGM_WRITE	1	Enables you to save changes to the object, but does not permit access to its data.
STGM_READWRITE	2	Enables access and modification of object data.
STGM_SHARE_DENY_NONE	64	Specifies that subsequent openings of the object are not denied read or write access. If no flag from the sharing group is specified, this flag is assumed.
STGM_SHARE_DENY_READ	48	Prevents others from subsequently opening the object in STGM_READ mode. It is typically used on a root storage object.
STGM_SHARE_DENY_WRITE	32	Prevents others from subsequently opening the object for STGM_WRITE or STGM_READWRITE access.
STGM_SHARE_EXCLUSIVE	16	Prevents others from subsequently opening the object in any mode. Be aware that this value is not a simple bitwise OR operation of the STGM_SHARE_DENY_READ and STGM_SHARE_DENY_WRITE values. In transacted mode, sharing of STGM_SHARE_DENY_WRITE or STGM_SHARE_EXCLUSIVE can significantly improve performance because they do not require snapshots.
STGM_PRIORITY	262144	Opens the storage object with exclusive access to the most recently committed version
STGM_DELETEONRELEASE	67108864	Indicates that the underlying file is to be automatically destroyed when the root storage object is released.
STGM_NOSCRATCH	1048576	Indicates that, in transacted mode, a temporary scratch file is usually used to save modifications until the Commit method is called.
STGM_CREATE	4096	Indicates that an existing storage object or stream should be removed before the new object replaces it. A new object is created when this flag is specified only if the existing object has been successfully removed.
STGM_CONVERT	131072	Creates the new object while preserving existing data in a stream named "Contents".
STGM_FAILIFTHERE	0	Causes the create operation to fail if an existing object with the specified name exists.
STGM_NOSNAPSHOT	2097152	This flag is used when opening a storage object with STGM_TRANSACTED and without STGM_SHARE_EXCLUSIVE or STGM_SHARE_DENY_WRITE. In this case, specifying STGM_NOSNAPSHOT prevents the system-provided implementation from creating a snapshot copy of the file.
STGM_DIRECT_SWMR	4194304	Supports direct mode for single-writer, multireader file operations.

Reference

ShellBoost.Core.WindowsShell Namespace