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The RegisterClass function registers a window class for subsequent use in calls to the CreateWindow or CreateWindowEx function.

Declare Function RegisterClass Lib "user32" Alias "RegisterClass" (Class As WNDCLASS) As Long

Operating Systems Supported
Requires Windows NT 3.1 or later; Requires Windows 95 or later


Parameter Information
- 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.

Last update: 07 April 2006