Compiling under VS2008
In this tutorial you will learn how to get the Source SDK to compile under Visual Studio 2008 and/or Visual C++ Express 2008. There are several things you're going to have to do to get it working. Before you begin, create your mod.



Install Visual Studio 2008
If you do not have Visual Studio 2008, you can download Visual C++ Express 2008 for free from Microsoft.
Upgrade to Service Pack 1
If you installed VS2008 before August 2008 it will probably need updating to SP1. The service pack will presumably be offered through Windows Update eventually, but for now you'll need to manually download it:
- Visual Studio update
- Visual C++ Express update (choose vcsetup.exe)
Service Pack 1 improves error reporting and fixes issues with Intellisense database corruption, alongside other improvements not directly relevant to the Source SDK.
Upgrade the project files
Visual Studio will prompt you to upgrade the project files. If you've been working on your mod in a previous version of the VS you'll probably want to have it make a backup of the project file, though this is a good time to do a backup of the entire source tree yourself anyway. Otherwise you can just do the conversion in-place.

whatever_2005.sln
to whatever_2008.sln
.Fix debug compilation
You don't actually need to compile in debug mode to debug your mod thanks to the PDB files Visual Studio generates in release mode. If you do want to make a debug build however:
Right-click > Properties on the Server and Client projects. Making sure that you are working on the Debug configuration (top left of properties dialogue) vhange Configuration Properties > Linker > Input > Ignore Specific Library to libc;libcd;libcmtd
(an extra 'd' on the end).
A function also needs commenting out at line 727 (OB code) of server/memoverride.cpp
:
void __cdecl _invalid_parameter_noinfo(void) { Assert(0); }
Get rid of the whole thing. Remember to launch your mod with -allowdebug
!
Fix missing symbols
If you see missing symbols such as: ConVar_Register you'll need to add tier3.lib to the Link Libraries folder.
Disable /Wp64
You'll receive warnings about the Wp64
option. You can ignore them if you like, but it's a simple matter to sort them out too: right-click > Properties on both the Server and Client projects, then change Configuration Properties > C/C++ > General > Detect 64-bit Portability Issues to No
.
Install the DirectX SDK (for shaders)
To create new shaders you will need the MS DirectX SDK (March 2009). Once installed, follow the below instructions below to incorporate it with your project.
- Go to Tools - Options: Projects and Solutions - VC++ Directories
- Select "Include files" and add "...\Microsoft DirectX SDK (November 2008)\Include"
- Select "Library files" and add "...\Microsoft DirectX SDK (November 2008)\Lib\x86"
- In the Solution Explorer right click 'client_hl2', and select Properties.
- In the client_hl2 properties window, navigate to Linker - Input
- Select the 'Additional Properties' row and click the '...' on the right hand side of the row
- If there is already an entry here, take a new line after it (a space will suffice if you cannot create a new line), and type ' user32.lib ' without the quotes.
- Repeat these steps for the server.
Missing vc80.pdb
You may encounter this error if try to compile more than one solution into the same folder. To fix it:
- Go to Tools > Options > Projects and Solutions > Create and execute
- Set the maximum number of parallel projectbuilds to 1
You may also have to close the task mspdbsrc.exe
.
Visual Studio 2008 users should go to Tools > Options > Projects and Solutions > Build and Run, and then set Maximum number of parallel projectbuilds to 1.