I dont know the code! PLS HELP!!!
I want to create a program that scan QR Code and Display the value in a textbox in VB.NET

What is the kind of application you are developing? Is it a standard Windows Forms application? If yes, you will find a lot of articles and examples on how to do this on the internet lots of them use 3rd party because it saves more time such as the library suggested by tinstaafl. There is also other articles such as:

These libraries deal with images so in order to detect the barcode from a webcam, you will need to get the image from the webcam for example get a frame from the webcam feed and pass it to the Barcode library and detect if it has barcodes.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.