WinBatch Sample Program
The following WinBatch program 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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; First load our DLL
dllhandle=DllLoad("DTWAIN32.DLL")
; Check for Twain Availability
isAvailable = DllCall(dllhandle, long:'DTWAIN_IsTwainAvailable')
if isAvailable == 1
; initialize the DTWAIN library
DllCall(dllhandle, long:'DTWAIN_SysInitialize')
; Select a TWAIN source
TwainSource = DllCall(dllHandle, long:'DTWAIN_SelectSource')
if TwainSource != 0
; Acquire a file
DllCall(dllHandle,
long:'DTWAIN_AcquireFile', long:TwainSource, lpstr:'TEST.BMP', long:100,
long:17, long:1000, long:1, long:1, long:1, long:0)
EndIf
; Close down DTWAIN
DllCall(dllHandle, long:'DTWAIN_SysDestroy')
EndIf
; unload the DLL
DllFree( dllHandle )
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In the example above, note that the DllLoad and DllFree commands
are used to load and unload the DTWAIN librrary. The DllCall command calls the
desired DTWAIN function with the appropriate parameters. Please consult your
WinBatch documentation for more information on these functions, plus information
on calling external DLL functions with proper parameter types.
In addition, the call to DTWAIN_AcquireFile has numeric arguments (100, 17,
1000, etc.). These are the DTWAIN constant values that correspond to DTWAIN_BMP,
DTWAIN_USELONGNAME, etc. For Macro Scheduler, it is required that the literal
constants be used when calling DTWAIN functions, instead of the symbolic names.
To get the constant's value, please see the DTWAIN32.wbt file for a list of the
symbolic names and their constant value.