The Switching between User and Kernal mode, happens in the background, and is an issue that User Mode programmers(as opposed to System Mose Programmers, which are mostly those working for Microsoft, writing the Next version of Windows), should have NO Concern about! There are ways of putting the system in Kernal Mode, but, I'm Not going to tell you, because you sound like someone who has not a notion about how windows works. believe me, I am saving yourself, and the friends to whom you propose to pass your software on, from a lot of hassle which would ensue if you went that way! Go the Windows Way, and use the WIN32 Api. Excepting special programs (e.g. Specialist Debuggers) Kernal Mode switching IS Not Needed!!! LateNightsInNewry

Try to run the commnd SFC /SCANNOW in the command prompt. You should prepare CD windows because it will require to replace any file that is corrupt too.

Not exactly. The thread that creates a window is the only thread that can pump messages for that window. So multiple threads can all send/post messages to a window, but only one thread can process them. --Mike-- Visual C++ MVP :cool: LINKS~! Ericahist | NEW!! PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

The DS_SYSMODAL style, which was for 16-bit Windows, has been "replaced" with the WS_EX_TOPMOST style. "Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain "There is no death, only a change of worlds." - Native American Proverb

thanks a lot

thanks a lot