Hello everyone.
I have a question experts.
I want to establish a connection with the scanner.
I want to take a picture from the scanner.
How do I do this?

Hello, Erdogan Uguz!

You can use COMObject to create an instance of WIA COM object or TWAIN add-in. Then you save a file to the temporary directory, read and save it in the ValueStorage attribute in the infobase.
Here are examples for you to start:

ScanDialog = New COMObject("WIA.CommonDialog");
ScanDialog.ShowAcquireImage();

TwainAddIn = New("AddIn.twain.AddInNativeExtension");
TwainAddIn.BeginScan(...);

I clicked on the link you wrote. I looked. Frankly, I do not understand anything.It seemed a bit confused. We are developing software using C # and Java. We use Twain and WIA. But here I do not understand how to use. I could not find in the Help guide. Is there a more detailed example?
- To list the scanner.
- Select the scanner.
- Get the picture from the scanner and to transfer the image box.

If you are asking about TWAIN component, those methods are named:
EnumDevices() - List scanners.
SelectDevice() - Select the scanner.
BeginScan(Boolean OpenDialog, String DeviceName, String PictureFormat, Number Resolution, Number Chromaticity, Number Rotation, Number PaperSize, Number DeflateParameter, Boolean DoubleSidedScan) - Get the picture from the scanner.

PictureFormat values:
a) PNG (default)
b) JPG
c) TIF
other formats, supported by the scanner

Resolution values:
number of dot per inch, for example 300 (300 DPI)

Chromaticity values:
a) 0 (black/white)
b) 1 (grayscale)
c) 2 (color)

Rotation values:
a) 0 (0 degrees)
b) 90 (90 degrees)
c) 180 (180 degrees)
d) 270 (270 degrees)

PaperSize values:
a) 0 (not set)
b) 11 (А3)
c) 1 (А4)
d) 5 (А5)
e) 6 (B4)
f) 2 (B5)
g) 7 (B6)
h) 14 (C4)
i) 15 (C5)
j) 16 (C6)
k) 3 (USLetter)
l) 4 (USLegal)
m) 10 (USExecutive)

DeflateParameter values:
Depend on the image format.
a) For JPG
0...100
b) For TIF:
2 – LZW
3 – CCITT3
4 – CCITT4
5 – RLE
6 – without compression

Thanks.