Applying a patch dll

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to patch a line of code in a DLL? Ask Question. Asked 10 years, 9 months ago. Active 10 years, 9 months ago. Viewed 12k times. Improve this question. Kees C. Bakker Kees C. Bakker John No I can upgrade, but I don't have the time to test their new version properly, but this bug is bugging my client a lot. Kees: you don't have time to test the new version, but you do have time to test your patch, which you assume will only affect the single line of code?

I'd tell your client to wait for the upgrade. Kees, we've all been there. Version X has 1 small bug and version Y fixes it but introduces new features, too, so you don't want to upgrade. But what John is saying is that trying to fix this one bug without seeing the entire source might break everything else. Its possible that portions of the code rely on this bug so fixing it for you might break it elsewhere. Have you ever wanted to learn how a program protects itself from being copied?

With the right tools, you can examine the inner workings of a program and experiment with reverse-engineering. You'll need have a firm grasp on assembly programming and hex code to get started, and a disassembler app. Once you're familiar with the code, you can modify the DLLs so their corresponding programs never have to be registered or purchased. Open the application in a disassembler. Find the counter function you want to change.

Set a break-point on the counter. Change the counter code. Recompile the software. Did this summary help you? Yes No. Log in Social login does not work in incognito and private browsers. Please log in with your username or email to continue. No account yet? Create an account. Edit this Article. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. Cookie Settings. Learn why people trust wikiHow.

Download Article Explore this Article Steps. Tips and Warnings. Related Articles. Article Summary. Learn Assembly programming and hex code manipulation. If you want to crack most software, you will need to have a good grasp on assembly , which is a low-level programming language. Most assembly language is expressed through binary and hexadecimal. Install a disassembler. To examine and modify DLLs, you will need several different tools, including a disassembler. IDA Pro is a great option, as it's a disassembler and debugger.

We can use diff to create a patch file that contains all of the differences between the files in two directories.

We can then use that patch file with patch to have those differences applied to the files in the working folder with a single command. The -N option tells diff how to handle files in the latest directory that are not in the working directory.

It forces diff to put instructions in the patch file so that patch creates files that are present in the latest directory but missing from the working directory. Scrolling further down through the patch file, we see that it then describes the changes in another file called structs.

This verifies that the patch file definitely contains the differences between different versions of multiple files. The --dry-run option tells patch to do everything apart from actually modifying the files. Either way, no files are modified. If no problems are reported, we can repeat the command without the --dry-run option and confidently patch our files. Out of the entire directory, diff found two files to patch.

The instructions regarding the modifications for those two files have been checked by patch , and no problems have been reported. To genuinely apply the patches to the files we use the previous command without the --dry-run option.

And no problems are reported. This is by far the easiest and safest way to use patch. Copy your target files to a folder and patch that folder. Use Google Fonts in Word. Customize the Taskbar in Windows What Is svchost. Best Home Theater Systems. Best Smartwatches. Best Gaming Laptops. Best Smart Displays.

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