Python Sample Script
The following Python 2.5 script is all that is required to do the following:
Check if TWAIN is installed.
Initialize the DTWAIN Dynamic Link Library.
Select a Source
Acquire a page using the Native transfer mode
Save page to a BMP file called "test.bmp"
Shut down any open TWAIN Source's and DTWAIN itself
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from ctypes import *
import DTWAIN32
mydll = windll.LoadLibrary("dtwain32.dll")
isAvail = mydll.DTWAIN_IsTwainAvailable( )
if isAvail:
mydll.DTWAIN_SysInitialize( )
TwainSource = mydll.DTWAIN_SelectSource( )
if TwainSource:
mydll.DTWAIN_AcquireFile(
TwainSource, "TEST.BMP", DTWAIN32.DTWAIN_BMP, DTWAIN32.DTWAIN_USELONGNAME,
DTWAIN32.DTWAIN_PT_DEFAULT, 1, 1, 1, 0 )
mydll.DTWAIN_SysDestroy( )
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Note that the cTypes facility of Python is used to
load the DTWAIN32.DLL and call the DTWAIN functions. Since the DTWAIN functions
all use the stdcall calling convention, the windll.LoadLibrary must be used to
correctly load DTWAIN32.DLL (do not use the cdll version of LoadLibrary!).
Also, the import DTWAIN32 imports the constants defined by the DTWAIN library.
For the import to succeed, the DTWAIN32.py module contains the constant
definitions, and should be located in your Python's path for imports (or in the
same directory as your Python scripts).