api???

what exactly is api, and what is it used for.

api is a lot of low-level calls to the Windows operating system. Does things you cannot do in VB.

There are several hundred commonly used api's.

If you want to learn about it -

Dan Appleman's

Visual Basic Programmer's Guide to the Win32 API is the most comprehensive book available for VB programmers.

API allows for a wide range of flexibility in your App. For example, one you get into subclassing, you can intercept messages so that the context menu of a textbox is not shown, or you can add support to the mouse wheel by catching the WM_MOUSEWHEEL event.
Subclassing is just one section of API. There are a lot more out there. For more information I suggest you look at Karl Moore's API tutorials on this site.

thanks man.....i am finally getting into advanced vb programming and i want to soak in as much as possible.