PvCountSelectionItems()

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PvCountSelectionItems()

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Count the number of selection items for a setting of types (PVSETTING_SINGLE_SEL or PVSETTING_MULTI_SEL).

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

Syntax

BTI_SINT PvCountSelectionItems( 
	BTI_LONG           hConnection, 
	BTI_ULONG          settingID, 
	BTI_ULONG_PTR      pNumItems);

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 categories can be obtained with the PvGetCategoryList() function. A list of settings for a particular category can be obtained from PvGetSettingList().
Out	pNumItems	Address of an unsigned long that receives the number of selection items.

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 selection type.
P_E_FAIL	Failed for other reasons.

Remarks

The following preconditions must be met:

DTI session started by calling PvStart().

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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