IMcRegionAccessBeginEndUpdateBlock Method |
|
used to prevent "Image Changed" notifications when
the client is applying a series of updates.
Namespace: MediaCy.IQL.Engine
Assembly: MediaCy.IQL.Engine (in MediaCy.IQL.Engine.dll) Version: 10.0.6912.0
SyntaxVB
Sub BeginEndUpdateBlock ( Optional Begin As Boolean = true )
Parameters
- Begin (Optional)
- Type: SystemBoolean
VARIANT_BOOL : If true, the user is signalling that a series of updates are beginning. False indicates the user is done.
RemarksBy default, a notification telling clients that the image has been changed
is sent every time pixel values are modified via PutPixel, PutLine,
and PutArea. This method allows the client to stop these notifications
in order to improve performance.
Internally, this method uses a reference counter. The counter is incremented
when the parameter is true, decremented when false. Notifications will only occur
when the counter is zero - it's default value.
See Also