Ok, here''s my problem (sorry for my horrible english and wrongful use of terminology I wrote a nice wrapper library for Direct3D8 a while ago, then formatted one of my hard drives, and oh! the horror!, my library huge header file got deleted... and now I don''t remember how I managed to code this : In my wrapper library, I call some custom initialisation function (such as the loading of d3d objects after alt-tabbing, etc...). Here''s what the code looks like: // Wrapper.cpp typedef VOIDPROC // (this is the part I forgot) VOIDPROC LoadD3DObjects; VOIDPROC KillD3DObjects; void MainInit(void) { InitDirect3D(); if(LoadD3DObjects != NULL) Load3D3Objects(); } // Project.cpp void LoadMyAppObjects(void) { LoadSomeStuff(); LoadSomeMore(); } void KillD3DObjects(void) { KillSomeStuff(); KillSomeMore(); } void MainProc(void) { LoadD3DObjects = LoadMyAppObjects(); KillD3DOBjects = KillMyAppObjects(); InitDirect3D(); } I only need to remember how to define my VOIDPROC variable type in order to get my library back on track. Any would be greatly appreciated. Thanks

Wow, thank you, it is exactly what I was looking for, and I never believed someone would post a solution to my problem so fast!