WIA queries...

  • Thread starter Thread starter Amrendra
  • Start date Start date
A

Amrendra

The queries are as follows:


[Query 1] At first, user sends the "Scan" request and then after a
while, issues "Cancel" request. Due to cancel request,
IWiaMiniDrv::drvNotifyPnPEvent() is called.

But the "*pGUID" parameter of drvNotifyPnPEvent() does
not contain the value "WIA_EVENT_CANCEL_IO".

[Note: "WIA_EVENT_CANCEL_IO" is initialized in
BuildCapabilities() helper function.]


[Query 2] At first, user sends the "Scan" request and when scan is in
progress, user "unplug the usb cable". Due to this,
IWiaMiniDrv::drvNotifyPnPEvent() is called.

But the "*pGUID" parameter of drvNotifyPnPEvent() does
not contain the value "WIA_EVENT_DEVICE_DISCONNECTED".

[Note: "WIA_EVENT_DEVICE_DISCONNECTED" is initialized in
BuildCapabilities() helper function.]

Please share your comments.

Regards
Amrendra
 
Please post copies of relevant reports taken the System Log in Event Viewer

You can access Event Viewer by selecting Start, Administrative Tools,
Event Viewer. When researching the meaning of the error, information
regarding Event ID, Source and Description are important.

HOW TO: View and Manage Event Logs in Event Viewer in Windows XP
http://support.microsoft.com/default.aspx?scid=kb;enus;308427&Product=winxp

A tip for posting copies of Error Reports! Run Event Viewer and double
click on the error you want to copy. In the window, which appears is a
button resembling two pages. Double click the button and close Event
Viewer. Now start your message(email) and do a paste into the body of the
message. This will paste the info from the Event Viewer Error Report
complete with links into the message. Make sure this is the first paste
after
exiting from Event Viewer.


Hope this helps.

Gerry
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