On Sat, Jul 12, 2008 at 12:38 AM, Joe Yoder <[EMAIL PROTECTED]> wrote:
> I have the EZtwain Classic package from dosadi installed and scanning to
> memory and then writing from memory to file. I can control the resolution
> and the pixel type (BW/GrayScale/Color) of the scan but can't control the
> brightness or contrast settings from my program. The scan happens as
> requested without an error but the image does not change with the brightness
> and contrast values set by my program.
Years ago I worked on a VB6 app that had similar problems. This
wasn't using EZTwain but VB code that accessed Twain_32.dll directly
(BTW this isn't possible with VFP as it requires modifying the core
event handler).
I've just found the source. Looks like I wrote to the scanners .INI
file before scanning. This was for a Cannon scanner but it might be
worth checking if you can do something similar for the HP:
'
' SetDitherTextEnhanced() - set the dither setting to 'Text Enhanced'
'
Public Sub SetDitherTextEnhanced()
Dim ininame As String
ininame = Environ("WinDir") & "\SETSCAN.INI"
If Dir(ininame, vbNormal) <> "" Then
' File exists
Call SetPrivateProfileString(scannerid, "Dither", "Text
Enhanced", ininame)
End If
End Sub
This just updates SETSCAN.INI in the Windows folder.
--
Paul
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