Note: As of March 1, , this version of EZTwain is no longer for sale. We are now selling licenses for EZTwain Pro 4, which is technically very similar but has. Hi, I wrote some sample vi for the EZtwain DLL from Dosadi. You can Which functionality missing in eztwain classic vs pro version for you?. ABSTRACT. The EZTWAIN library has been around for a long time. With Visual C and Visual Basic it is pretty easy to import the API calls from.

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Once scanned, the image is saved to disk in.

TWAIN Support –

You may want to check to be sure clasaic have the most current version v1. The most current version of EZTW To conserve space and time, the preliminary steps of checking version, existence of, and selection of the scanner has been omitted. EZTwain will default to the last scanner chosen. Others will be addressed in a planned follow up article. A problem with this approach is that the handle of the DIB is not necessarily the handle of the bitmap recognizable eztwwain Liberty BASIC, but more a pointer to where the bitmap lies in memory.

Fortunately, only a few functions are required for allowing your Liberty BASIC program to communicate with a scanner and access the images. DLL, multiplied by Passing ezrwain seems safest.


The function does not check if the scanner is connected or turned on. The user won’t know the difference.

Dosadi places EZTwain Classic in the public domain, and makes no claim or warranty of any kind regarding this software. This function opens the scanner’s dialog, allowing the user to scan the image.

There are ezhwain least 53 functions in EZTW Only a eztwaij of the functions will be addressed in this article. It’s free, it’s simple, and it works. A return value of 1 indicates the user has made a selection.

Unable to lock DIB. The function allows the handle of the application hApp be passed, but will accept a 0. As documented by Alyce, the clipboard must first be opened, the contents retrieved, and then the clipboard closed.

This article is intended to bridge that gap. Did you cancel without saving? You can view Don’s original code at http: You can download eztwaindemo at http: It is important to note that EZTwain does not automatically scan.


The dll has been widely used since its introduction in It takes a little time on the first call, after that it’s fast, ‘ just testing a flag. The user initiates the scan through the scanner’s own application window. Bitmap saved to disk. Divide that integer by to get the version.

BMP Windows Bitmap file. DLL has been placed in the public domain by Dosadi. A few provide basic information width, height, bitmap depth of the scanned image itself.


A return of 1 indicates one or more scanners have been installed to the system. A return of 0 indicates a successful save.

The function then returns the handle of the device independent bitmap hDIB. The TWAIN spec calls for this feature to be available in ‘ your user interface, preferably as described. Your app has one of ‘ these, right? Supported values of wPizTypes are documented within the comments of the function.

If only one TWAIN device is installed on a system, it is selected ‘ automatically, so there is no need for the user to do Select Source. Unfortunately, this is not the case.

Others are needed to interface with the more complex GUI structuring demanded by other languages.

EZTwain Pro

If this call fails, the clipboard is either empty or ‘ contains the old contents. The current default source will be highlighted initially. Many of these functions control eatwain scanner device itself. If you use this package, you assume all responsibility for the results or lack thereof.

Dosadi continues to make this dll available, but offers no support for it.