INTRODUCTION:
Programming for interactive graphical user interfaces is known as GUI (Graphical User Interface) programming. It is still possible to design GUI applications using the C programming language, and there are various GUI libraries available for this purpose, despite the fact that this language is not traditionally associated with GUI development.
GUI LIBRARY:
GTK (GIMP Toolkit) is a well-known GUI package for C that offers a complete set of widgets and tools for creating cross-platform GUI applications. Qt is a well-liked library that is frequently used when creating GUI applications in C++.
You need a solid grasp of the concepts and methods of GUI programming in order to develop a GUI application using the C programming language. You should be familiar with the following essential ideas:
Event-driven programming:
The majority of GUI programming is event-driven, meaning that it reacts to user activities like button clicks and mouse movements.
Widgets:
The graphical elements known as widgets, including buttons, text fields, and menus, make up GUI programmes.


Layouts:
A layout is the configuration of widgets on a graphical user interface. There are various layout kinds, including grid, box, and absolute layouts.
Signals and slots:
Signals and slots are a method used by GUI applications to link user activities with programme code. When a user takes an action, a signal is released, and a slot is a function that is carried out in response to the signal.
Graphics:
Working with visuals, such as drawing lines, circles, and images on the screen, is a common part of GUI development.
CONCLUSION:
Although it can be difficult, writing a GUI application in the C programming language can also be gratifying. You can develop robust and dynamic applications that cater to the needs of your consumers if you have the necessary skills and resources.