Events

Functions
void	CVCError (ErrorCode ErrorNumber, BSTR ErrorString, boolean *Continue)
	This event is fired, if an error occurs in the CVGenApiGrid Control. More...
void	VisibleNodeUpdated (BSTR NodeName)
	Generated when a visible Node has changed. More...

Detailed Description

Function Documentation

CVCError()

void CVCError	(	ErrorCode	ErrorNumber,
		BSTR	ErrorString,
		boolean *	Continue
	)

This event is fired, if an error occurs in the CVGenApiGrid Control.

This is used for general error reporting, for example invalid value sets by a user or write/read access errors regarding the remote device.

The user can overwrite the Continue value in order to change the default action. The default value depends on the function that caused the error.

TRUE specifies that a message box will appear to inform the user of the error. FALSE means that it is possible to perform custom error handling, e.g. use a self-defined message-box.

Please include the appropriate header file for your compiler (cvcerror.*). The following error codes have been defined:

1	CVC_E_ERROR
	This error cannot be described more precisely.
2	CVC_E_PARAMETER
	Incorrect parameter in a function call.
3	CVC_E_FILEIO
	File I/O error, for example while saving or loading an image.
5	CVC_E_MEMORY
	Memory could not be allocated.
11	CVC_E_PROPERTYREAD
	A property could not be read.
12	CVC_E_PROPERTYWRITE
	A property could not be written.
14	CVC_E_PORTREAD
	A port could not be read.
15	CVC_E_PORTWRITE
	A port could not be written.
17	CVC_E_NOINTERFACE
	No interface is available.
19	CVC_E_NOTSUPPORTED
	A certain feature is not supported.
22	CVC_E_NOTENOUGHDATA
	Too few data available for a calculation.
29	CVC_E_WRONGOBJECT
	Wrong object.
30	CVC_E_NOTREADY
	Not ready for the requested operation.
45	CVC_E_ACCESS
	Access error.
46	CVC_E_NOTPRESENT
	Not present.
47	VC_E_UNSUPPORTEDFEATURE
	Unsupported feature.

Parameters

[in]	ErrorNumber	A unique number describing the error (see above).
[in]	ErrorString	Contains the error text of the output.
[in,out]	Continue	This specifies whether execution should continue despite the error.

Related Topics:

Complete List of all CVCErrorCodes, Image Control CVCErrorEvent, Display Control CVCErrorEvent

VisibleNodeUpdated()

void VisibleNodeUpdated

(

BSTR

NodeName

)

Generated when a visible Node has changed.

The happens for example if a new value is set to a node by the user or a new value is polled.

Attention

This event is only fired for feature nodes currently visible in the UI.