 /*
Roblox DLL Injector

This program demonstrates how to create a DLL that can be injected into Roblox UWP (Universal Windows Platform) applications.

*/

using System;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;

namespace RobloxDLLInjector
{
    class Program
    {
        // Define the path to the Roblox UWP application
        const string RobloxAppPath = "C:\\Program Files\\WindowsApps\\RobloxCorporation.Roblox_2.457.414557.0_x86__s1f2f1y6ty8m4";

        // Define the name of the DLL to be injected
        const string DllName = "MyInjectedDLL.dll";

        // Define the entry point function in the DLL
        const string DllEntryPoint = "MyInjectedFunction";

        // Define the path to the DLL file
        const string DllPath = "C:\\Path\\To\\MyInjectedDLL.dll";

        // Import the necessary functions from kernel32.dll
        [DllImport("kernel32.dll")]
        public static extern IntPtr OpenProcess(int dwDesiredAccess, bool bInheritHandle, int dwProcessId);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr GetModuleHandle(string lpModuleName);

        [DllImport("kernel32.dll", CharSet = CharSet.Ansi)]
        public static extern IntPtr GetProcAddress(IntPtr hModule, string lpProcName);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern IntPtr VirtualAllocEx(IntPtr hProcess, IntPtr lpAddress, uint dwSize, uint flAllocationType, uint flProtect);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern bool WriteProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, byte[] lpBuffer, uint nSize, out int lpNumberOfBytesWritten);

        [DllImport("kernel32.dll")]
        public static extern IntPtr CreateRemoteThread(IntPtr hProcess, IntPtr lpThreadAttributes, uint dwStackSize, IntPtr lpStartAddress, IntPtr lpParameter, uint dwCreationFlags, IntPtr lpThreadId);

        static void Main(string[] args)
        {
            try
            {
                // Check if the Roblox UWP application is running
                Process[] processes = Process.GetProcessesByName("RobloxPlayerBeta");
                if (processes.Length == 0)
                {
                    Console.WriteLine("Roblox UWP application is not running.");
                    return;
                }

                // Get the process ID of the Roblox UWP application
                int processId = processes[0].Id;

                // Open the process with the necessary access rights
                IntPtr processHandle = OpenProcess(0x1F0FFF, false, processId);
                if (processHandle == IntPtr.Zero)
                {
                    Console.WriteLine("Failed to open the process.");
                    return;
                }

                // Get the address of the LoadLibraryA function in kernel32.dll
                IntPtr loadLibraryAddress = GetProcAddress(GetModuleHandle("kernel32.dll"), "LoadLibraryA");
                if (loadLibraryAddress == IntPtr.Zero)
                {
                    Console.WriteLine("Failed to get the address of LoadLibraryA.");
                    return;
                }

                // Allocate memory in the remote process to store the DLL path
                IntPtr remoteMemory = VirtualAllocEx(processHandle, IntPtr.Zero, (uint)DllPath.Length, 0x1000, 0x40);
                if (remoteMemory == IntPtr.Zero)
                {
                    Console.WriteLine("Failed to allocate memory in the remote process.");
                    return;
                }

                // Write the DLL path to the allocated memory in the remote process
                byte[] dllPathBytes = System.Text.Encoding.ASCII.GetBytes(DllPath);
                int bytesWritten;
                if (!WriteProcessMemory(processHandle, remoteMemory, dllPathBytes, (uint)dllPathBytes.Length, out bytesWritten))
                {
                    Console.WriteLine("Failed to write the DLL path to the remote process memory.");
                    return;
                }

                // Create a remote thread in the Roblox UWP application to load the DLL
                IntPtr threadHandle = CreateRemoteThread(processHandle, IntPtr.Zero, 0, loadLibraryAddress, remoteMemory, 0, IntPtr.Zero);
                if (threadHandle == IntPtr.Zero)
                {
                    Console.WriteLine("Failed to create a remote thread in the Roblox UWP application.");
                    return;
                }

                Console.WriteLine("DLL injected successfully.");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"An error occurred: {ex.Message}");
            }
        }
    }
}

created 1 year ago

C Sharp Online Compiler

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Read inputs from stdin

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using System;
 
namespace Sample
{
  class Test
    {
      public static void Main(string[] args)
       {
         string name;
         name = Console.ReadLine();
         Console.WriteLine("Hello {0} ", name);
	}
     }
}

About C Sharp

C# is a general purpose object-oriented programming language by Microsoft. Though initially it was developed as part of .net but later it was approved by ECMA and ISO standards.

You can use C# to create variety of applications, like web, windows, mobile, console applications and much more using Visual studio.

Syntax help

Data types

Data Type	Description	Range	size
int	To store integers	-2,147,483,648 to 2,147,483,647	4 bytes
double	to store large floating point numbers with decimals	can store 15 decimal digits	8 bytes
float	to store floating point numbers with decimals	can store upto 7 decimal digits	4 bytes
char	to store single characters	-	2 bytes
string	to stores text	-	2 bytes per character
bool	to stores either true or false	-	1 bit

Variables

Syntax

datatype variable-name = value;

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition or set of few conditions IF-ELSE is used.

if(conditional-expression) {
   // code
} 
else {
   // code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression) {    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
...    
    
default:     
 // code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement) {
  // code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition) {
 // code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {
  // code 
} while (condition);

Arrays

Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.

Syntax

data-type[] array-name;

Methods

Method is a set of statements which gets executed only when they are called. Call the method name in the main function to execute the method.

Syntax

static void method-name() 
{
  // code to be executed
}