Is it possible to work in an exe file using your program?

Question

Delphi

Hello! Interested in the question, is it possible to write such a program in Delphi, which is able to open an exe file and work in it in hidden mode?

Answer 1

Rephrase the question, it is not friendly with logic at all.
Apparently you want dll injections. To do this, you can write your own dll in Delphi, in which you will have functions from exe. When you call the desired function, your program will first call your dll, execute some code, and then either exit the function or move on to the original function.
But the original program will have to be picked and disassembled in order to understand what functions it has, what they are called, what arguments and data types they have.

Answer 2

If you need interaction with the interface of another program - FindWindow + SendMessage. Just fall in love and dance, this is a thankless task. Well, the operating system and AV will not contribute.

Answer 3

First you need to write a program that will allow a third-party program to perform certain actions, and then you can write a program that will be able to open another program and work in it in a hidden mode that will be provided in advance when writing the program.