RegisterClass
The RegisterClass
function registers a window class for subsequent use in calls to the CreateWindow
or CreateWindowEx function.
The RegisterClass
function has been superseded by the RegisterClassEx function. You can still use
RegisterClass, however, if you do not need to set the class small icon.
ATOM RegisterClass(
|
CONST WNDCLASS *lpWndClass |
// address of
structure with class data |
|
); |
|
Parameters
lpWndClass
Points to a WNDCLASS structure. You must fill
the structure with the appropriate class attributes before passing it to the
function.
Return Values
If the
function succeeds, the return value is an atom that uniquely identifies the
class being registered.
If the
function fails, the return value is zero. To get extended error information,
call GetLastError.
Remarks
All window
classes that an application registers are unregistered when it terminates.
Windows
95: RegisterClass fails if the
cbWndExtra or cbClsExtra member of the WNDCLASS structure
contains more than 40 bytes.
See Also