TwainControllerRegisterTwainCallback Method |
Sets up a callback for TWAIN device messages instead of using the traditional message loop. This should only be called when using the TwainController directly; the Device object automatically handles the callback.
The callback feature is only supported when using the TWAIN 2.0 Data Source Manager
Namespace: Atalasoft.Twain
Assembly: Atalasoft.DotTwain (in Atalasoft.DotTwain.dll) Version: 11.4.0.9.0.377 (.NET 4.5.2, x86)
SyntaxParameters
- callback
- Type: Atalasoft.TwainTwainDeviceCallbackEventHandler
An event handler to use for the callback.
Return Value
Type: TwainReturnCodeRemarks When using a callback, this method must be called after OpenSource
or OpenSource(TwainIdentity).
The callback is no longer valid after CloseSource.
See Also