Public Function GetModeDefinitions( _
   ByRef clientUpdateMode As Integer, _
   ByRef writeCacheUpdateMode As Integer, _
   ByRef exeStartupMode As Integer, _
   ByRef lookupMode As Integer, _
   ByRef notYetUsed3 As Integer, _
   ByRef notYetUsed4 As Integer, _
   ByRef notYetUsed5 As Integer, _
   ByRef notYetUsed6 As Integer _
) As Integer

Visual Basic (Usage)

Copy Code

Dim instance As GenericServer Dim clientUpdateMode As Integer Dim writeCacheUpdateMode As Integer Dim exeStartupMode As Integer Dim lookupMode As Integer Dim notYetUsed3 As Integer Dim notYetUsed4 As Integer Dim notYetUsed5 As Integer Dim notYetUsed6 As Integer Dim value As Integer   value = instance.GetModeDefinitions(clientUpdateMode, writeCacheUpdateMode, exeStartupMode, lookupMode, notYetUsed3, notYetUsed4, notYetUsed5, notYetUsed6)

public int GetModeDefinitions( 
   out int clientUpdateMode,
   out int writeCacheUpdateMode,
   out int exeStartupMode,
   out int lookupMode,
   out int notYetUsed3,
   out int notYetUsed4,
   out int notYetUsed5,
   out int notYetUsed6
)

public: int GetModeDefinitions( 
   [PARAMFLAG::Out] int clientUpdateMode,
   [PARAMFLAG::Out] int writeCacheUpdateMode,
   [PARAMFLAG::Out] int exeStartupMode,
   [PARAMFLAG::Out] int lookupMode,
   [PARAMFLAG::Out] int notYetUsed3,
   [PARAMFLAG::Out] int notYetUsed4,
   [PARAMFLAG::Out] int notYetUsed5,
   [PARAMFLAG::Out] int notYetUsed6
) 

public:
int GetModeDefinitions( 
   [Out] int clientUpdateMode,
   [Out] int writeCacheUpdateMode,
   [Out] int exeStartupMode,
   [Out] int lookupMode,
   [Out] int notYetUsed3,
   [Out] int notYetUsed4,
   [Out] int notYetUsed5,
   [Out] int notYetUsed6
) 

Parameters

clientUpdateMode

Client update mode handling:
0 (CachePoll): The client update thread periodically checks all items in active groups for changes
1 (Queue): The cache write method adds changed items to the OPC group assigned queue for each group having the item.

The default value is 0 (CachePoll). In the DANSrv.exe.config the value can be defined as:
<add key="ClientUpdateMode" value="CachePoll"/> <!-- CachePoll (0) or Queue (1) -->

writeCacheUpdateMode

Controls the cache update in the handling of client write calls:
0 (Generic): The cache is updated in the generic server after returning from the customization WiteItems method. Items with write error are not updated in the cache.
1 (Custom): The generic server does NOT update the cache. The customization module has to update the cache by executing the SetItemValue callback method for each written item.

The default value is 0 (Generic). In the DANSrv.exe.config the value can be defined as:
<add key="WriteCacheUpdateMode" value="Generic"/> <!-- Generic (0) or Custom (1) -->

exeStartupMode

Determines how the server starts when the EXE file is executed. This definitin has no effect when DCOM starts the server due to a client connect. The possible values are defined in the enumerator ExeStartMode.

lookupMode

notYetUsed3

Can be used later without having to change the DLL interface

notYetUsed4

Can be used later without having to change the DLL interface

notYetUsed5

Can be used later without having to change the DLL interface

notYetUsed6

Can be used later without having to change the DLL interface

Return Value

Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family

Reference