On Wednesday, December 12, 2012 1:18:17 PM UTC-8, Ian Jackson wrote:
In message ,

JRosen writes

This question is more about software than about hardware but here goes:

The Computer Manager window of my Windows 7 laptop contains a device

labeled "Canon MX700 Ser" (I have a Canon MX700 multifunction) and

Canon's documentation identifies ScanGear, the one-and-only scanner

driver invoked from MP Navigator Ex (the Canon-supplied scanner

software), as TWAIN-compliant. However, I can also operate the MX700's

scanner from "Windows FAX and Scan," so there must be a WIA-compliant

scanner driver somewhere in the laptop. This begs two questions:

1) Is there just one scanner driver ("Canon MX700 Ser") in the laptop

which is both WIA- and TWAIN-compliant?

2) Or has Canon supplied two scanner drivers, one TWAIN-compliant and

the other WIA-compliant?



Thanks in advance for any help in answering these questions.



I'm using XP Home, and I'm not sure if this is related, but about a year

ago, I suddenly found that I could no longer could scanning with my

Epson 1260. All my imaging programs said "TWAIN driver not found".



I searched and found what appeared to be the appropriate TWAIN driver

(there are at least two), but no matter what I did, it simply didn't

work. [I think it was the same as the one which was on the software that

came with the scanner.] Apparently I'm not the only one suddenly to lose

scanner function, and it is said that this is probably caused by one of

the Windows updates.



By chance, I found that MS Paint and Photoshop 7 (but not 4) offered a

WIA scan. At first sight, it's much more basic than with the Epson

driver - but at least it does the job - so in practice, all is well. So

it might be worth trying MS Paint (which Windows 7 should have - and if

not, I think you can download it free). [Note that my scanner continues

to work as originally (with TWAIN) on a laptop with XP Professional and

on another with Windows 7 Professional.]

--

Ian
Thanks the info, but my problem isn't accessing TWAIN or WIA functionality --- I can readily access both capabilities. I'm curious how those capabilites are packaged in my computer: is there just one driver that's both TWAIN- and WIA-compatible, or are there two drivers that separately package those capabilities?

JRosen