Validating a Win32 Window Handle

Question

Given a handle of type HWND is it possible to confirm that the handle represents a real window?

Answer 1

There is a function IsWindow which does exactly what you asked for.

BOOL isRealHandle = IsWindow(unknwodnHandle);

Look at this link for more information.

Answer 2

Generally no. By the time you've got confirmation that a Window is valid another process/thread my come along and remove it for you.

Answer 3

Graham is right .. some time in race it is very tough to rely on IsWindow API