Hooking DirectX's DirectDraw API to draw an overlay using Windows GDI

Just some code I had lying around. Not many people still code in Delphi/Pascal, so I decided to just release this snippet. This project uses the DirectDraw API to find a pointer to the IDirectDrawSurface7 Blt() method, then uses CreateBackup() to dynamically allocate memory and create a backup of the method. Then it creates an API hook on the Blt() method and forwards all calls to myBlt(). This let's you access all device contexts for DirectDraw surfaces.

1. Compile as a .dll file
2. Use DLL Injection onto a process that uses the DirectDraw API

• This code was tested on Windows XP x86
• It was tested to compile on Delphi 7
• If you encounter ANY errors, feel free to contact me!

• Brandon Asuncion - [email protected]
• Aphex - for afxCodeHook library

MIT License