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Home » Tip Bank » C++
Language: Enterprise
Expertise: Beginner
Apr 2, 2001

Differentiate Between Kernal and Non-Kernal Objects


In Win32 we create many objects - Windows, File, Threads, process, Semaphore, Event, Pen, Brush, etc. Some of the above are kernal objects while others are not. This tip is an intuitive way to tell whether an object is a kernal object or not.

Look at the arguments of the function that creates that object. If the function takes SECURITY_ATTRIBUTES as an argument, then that object is a kernal object.

For example, following are kernal objects:
 
HANDLE CreateThread( LPSECURITY_ATTRIBUTES lpThreadAttributes,  ...)

HANDLE CreateSemaphore(
LPSECURITY_ATTRIBUTES lpSemaphoreAttributes, ..)

The following are not kernal objects:
 
HWND CreateWindow(
LPCTSTR lpClassName, ..)

HPEN CreatePen(
int fnPenStyle, ...)
Rajesh Chathapuram
 
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