I have a simple test project which works great on my machine where I built it. When I send it to my friend it crashes on his computer. We're both using 64 xp sp2. Making the entire project 32bit works! This is how I created the 64bit SDL. Opened the VisualC project from the developer package. Created a new config in visual studio, x64 based of the project. Compile, both lib and the dll builds fine. Build my project with these files. No errors. For some reason the dll doesnt work very well on a computer outside my building environment. Just adding the libs and sdl.h to the project works! Soon as I make a call to the dll, the thing crashes. Any ideas would be very kind! I've uploaded my files here http://www.megaupload.com/?d=YAR98GLD