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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| user32.lib
| Header File
| winuser.h
| Unicode
| WinNT
| Platform Notes
| None
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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The RegisterClass function has been superseded by the RegisterClassEx function.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
| );
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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
CreateWindow, CreateWindowEx, GetClassInfo, GetClassName, RegisterClassEx, UnregisterClass, WindowProc, WNDCLASS
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Unix Manual Pages
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