# Basic C# Mod

# Introduction

The following guide will walk you through step-by-step on how to create a basic C# mod. This mod will add a button to the singleplayer title screen called Message. When clicked, this button will output Hello World to chat.

# Preparation

# For this tutorial, we will be naming our project ExampleMod.

# Setting up your Module (SubModule.xml)

  1. Go to your game files and locate the Modules directory.

  2. Create a new folder and name it ExampleMod (Must be the same as the Id you use for Step #4).

  3. Create a new folder named bin and inside this directory, create a new folder called Win64_Shipping_Client.

  4. Create a new SubModule.xml file (must be named this) inside the folder you created in Step #2 and then paste the following into it:

     <Module>
         <Name value="Example Mod"/>
         <Id value="ExampleMod"/>
         <Version value="v1.0.0"/>
         <SingleplayerModule value="true"/>
         <MultiplayerModule value="false"/>
         <DependedModules>
             <DependedModule Id="Native"/>
             <DependedModule Id="SandBoxCore"/>
             <DependedModule Id="Sandbox"/>
             <DependedModule Id="CustomBattle"/>
             <DependedModule Id="StoryMode" />
         </DependedModules>
         <SubModules>
             <SubModule>
                 <Name value="ExampleMod"/>
                 <DLLName value="ExampleMod.dll"/>
                 <SubModuleClassType value="ExampleMod.MySubModule"/>
                 <Tags>
                     <Tag key="DedicatedServerType" value="none" />
                     <Tag key="IsNoRenderModeElement" value="false" />
                 </Tags>
             </SubModule>
         </SubModules>
         <Xmls/>
     </Module>
    

    Note: MySubModule is the name of the class we will be using in the Programming section of the tutorial.

  5. If you are using different names, change the above values to match that of your Module/SubModule.

  6. Start the launcher and make sure your mod appears under Singleplayer > Mods.

For more information on the Module folder structure, Click Here.

# Setting up your Project

Before setting up a project, it is important to know that this is not required for basic mods (e.g. changing or adding items/characters/scenes).

  1. Start Microsoft Visual Studio and select Create New Project.
  2. Choose Class Library (.NET Framework).
  3. Name your project ExampleMod (if you choose another name make sure that your namespace and assembly name are correct) .NET Framework 4.7.2 as the Framework. If this option is not available for you, Download it here (Developer Pack).
  4. Now that your project is setup, set your build path to the Modules/ExampleMod/bin/Win64_Shipping_Client directory in your game files.
  5. Reference the TaleWorlds.* DLLs in the bin\Win64_Shipping_Client directory of your game files (not your module directory). Also reference the TaleWorlds.* DLLs for each official module in Modules\ModuleName\bin\Win64_Shipping_Client.

# Debugging your Project (Optional)

# Way 1 (Preferred)

  1. Open your project properties and go to the Debug tab.
  2. Select the Start external program option and then browse for Bannerlord.exe located in the bin\Win64_Shipping_Client directory in your game files (not your module directory).
  3. Set your working directory to the bin\Win64_Shipping_Client directory in your game files (not your module directory).
  4. Add the following command line arguments (be sure to replace ExampleMod with the name of your module):
    • /singleplayer _MODULES_*Native*SandBoxCore*CustomBattle*SandBox*StoryMode*ExampleMod*_MODULES_

# Way 2 (If you want to start your debugging from launcher window)

  1. Open your project properties and go to the Debug tab.
  2. Select the Start external program option and then browse for TaleWorlds.MountAndBlade.Launcher.exe located in the bin\Win64_Shipping_Client directory in your game files (not your module directory).
  3. Set your working directory to the bin\Win64_Shipping_Client directory in your game files (not your module directory).

# Programming

  1. Create a new class in your VS Project and name it MySubModule, then open it.

  2. Add the following using directives to your class:

     using TaleWorlds.Core;
     using TaleWorlds.Localization;
     using TaleWorlds.MountAndBlade;
    
  3. Inherit from the MBSubModuleBase class.

  4. Setup an override for the OnSubModuleLoad() inherited method.

  5. Add the following code to your override method:

     Module.CurrentModule.AddInitialStateOption(new InitialStateOption("Message",
         new TextObject("Message", null),
         9990,
         () => { InformationManager.DisplayMessage(new InformationMessage("Hello World!")); },
         false));
    
  6. Compile your project and confirm that it was outputted to Modules\ExampleMod\bin\Win64_Shipping_Client.

  7. Open the Bannerlord launcher and navigate to Singleplayer > Mods then make sure that your mod is ticked and start the game.

  8. On the title screen, you should now see a button called Message, click it and you should see Hello World displayed in the bottom-left corner of your screen (in chat).

  9. You have now successfully created your first Bannerlord mod!