Bank Account Management System (Windows GUI)

A secure, user-friendly banking application with a Windows GUI interface, built using the Win32 API. The application allows customers to manage their bank accounts with an intuitive interface, featuring secure PIN-based authentication and data persistence.

✨ Features

• Modern Windows GUI with intuitive dialogs and controls
• Secure Account Management
  • Register new accounts with personal details and 4-digit PIN
  • Secure login with account number and PIN
  • Change account PIN
  • Soft-delete accounts
• Financial Operations
  • Deposit funds
  • Withdraw funds (with balance validation)
  • View current balance
• Data Management
  • Export all accounts to a formatted text file
  • Persistent storage in binary format
  • Automatic data file creation if not exists

Project Structure

File	Purpose
trans.c	Main application source code with all business logic and GUI handlers
main_gui.rc	Resource script containing dialog box definitions
resource.h	Header file with resource IDs and constants
credit.dat	Binary database file storing all account information
accounts.txt	Exported account information in readable format
trans.exe	Compiled executable (Windows)
main_gui_res.o	Compiled resources (generated during build)

Prerequisites

• Windows OS
• MinGW-w64 (for compilation)
• Basic command-line knowledge

Compilation Instructions

1. Install MinGW-w64 (if not already installed)

   • Download from: https://www.mingw-w64.org/
   • Add MinGW bin directory to your system PATH

2. Compile the Resources

   windres main_gui.rc -o main_gui_res.o

3. Compile the Application

   gcc trans.c main_gui_res.o -o trans.exe -mwindows -lcomctl32

🖼️ Screenshots

Main Window

Account Registration

Account LOGIN

Account Management

Running the Application

1. Double-click trans.exe or run from command line:

   .\trans.exe

2. Main Window

   • Register: Create a new bank account
   • Login: Access existing account
   • Export: Save account data to accounts.txt
   • Exit: Close the application

Usage Guide

Creating a New Account

1. Click "Register"
2. Fill in your first name, last name, and a 4-digit PIN
3. Note your account number shown in the success message

Accessing Your Account

1. Click "Login"
2. Enter your account number and PIN
3. Use the account management interface to perform transactions

Managing Your Account

• Deposit/Withdraw: Enter amount and confirm
• Change PIN: Enter current and new PIN
• Delete Account: Requires account PIN for confirmation
• Logout: Returns to main menu

Security Notes

• All PINs are stored securely in the database
• Account numbers range from 100 to 999
• Data is automatically saved after each operation
• Deleted accounts are marked as inactive but remain in the database