| title | description | ms.date |
|---|---|---|
WIA Driver Error Recovery |
WIA Driver Error Recovery |
04/20/2017 |
There are multiple points in the WIA image acquisition process where software, hardware, or configuration errors can cause unexpected delays, failure messages, or indecipherable hangs. Most of these errors occur at the point where the application requests image data, either for preview or for the full image.
This section describes a mechanism that allows applications and users to gracefully handle these errors and delays, and possibly, to recover from them. It does not address ways to improve error recovery while trying to set or get device properties, or when callback routines into a driver never return, or during other non-transfer related situations.
This section includes:
WIA Error Handling Architecture
WIA Error Handler Cancellation of Modeless Dialogs
WIA Error Handler Return Values
Installing a WIA Error Handling Driver Extension
For information about the WIA error macros, see WIA Diagnostic Log Macros.