RegisterClassEx RHP7PH

[Now Supported on Windows NT]

The RegisterClassEx function registers a window class for subsequent use in calls to the CreateWindowWE1R5Q or CreateWindowExRPK.PC function. The RegisterClass6V_00HU function does not allow you to set the small icon.

ATOM RegisterClassEx(

CONST WNDCLASSEX *lpwcx	// address of structure with class data
);

Parameters

lpwcx

Points to a WNDCLASSEX2D0J0KL 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 GetLastError11C2VS7.

Remarks

All window classes that an application registers are unregistered when it terminates.

Windows 95: RegisterClassEx fails if the cbWndExtra or cbClsExtra member of the WNDCLASSEX structure contains more than 40 bytes.