It doesn't matter if I create a new MFC App as MDI, SDI or Dialog-Based. Whenever I start my program in debug, I get a gazillion of these exceptions and I can't figure out why. I've traced (at least the first set of these, there seem to be a set for the main window, the toolbar, and possibly the status bar) it down to a call to CWnd::::CreateWindowEx(...). This is a function I cannot step into and causes a ton of these exceptions to be spit out at me. All I've done is create the application (either MDI, SDI or Dialog-based) using the AppWizard, compiled and run it. Nothing fancy, and nothing to explain what is happening. Any ideas? I'd be happy to list out the options I chose in AppWizard. I'm running Visual C++ 6.0.