PvGetSelectionValue()

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PvGetSelectionValue()

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Retrieves the value for a selection type setting, from the data source specified by whichData.

Header file: CONFIG.HRequires: W3DBAV75.DLL or higher version

Syntax

BTI_SINT PvGetSelectionValue( 
	BTI_LONG           hConnection, 
	BTI_ULONG          settingID, 
	BTI_ULONG_PTR      pNumItems, 
	BTI_LONG_PTR       pValue, 
	BTI_SINT           whichData);

Arguments


In	hConnection	Connection handle that identifies the server. Connection handles are obtained with the PvConnectServer() function.
In	settingID	Unique identifier for the setting. A list of settings can be obtained from PvGetSettingList().
In/Out	pNumItems	Address of an unsigned long that specifies the array size on input, and receives the number of individual selection items on return.
Out	pValue	Array of individual selection indexes.
In	whichData	Flag to indicate which value is requested: PVDATA_DEFAULT returns default value. PVDATA_CURRENT returns current value

Return Values


P_OK	The operation was successful.
P_E_INVALID_HANDLE	Invalid connection handle.
P_E_NULL_PTR	Call with NULL pointer.
P_E_INVALID_DATA_TYPE	The requested setting is not of string type.
P_E_BUFFER_TOO_SMALL	The array size is too small. In this case, the required size is returned in pNumItems.
P_E_FAIL	Failed for other reasons.

Remarks

The following preconditions must be met:

Connection established by PvConnectServer() or if you are performing the operation on a local machine, P_LOCAL_DB_CONNECTION may be used as the connection handle.

See Also

PvStart()
PvConnectServer()
PvGetCategoryList()
PvGetSettingList()
PvDisconnect()
PvStop()

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