GetClassInfoA function

Retrieves information about a window class.

Note  The GetClassInfo function has been superseded by the GetClassInfoEx function. You can still use GetClassInfo, however, if you do not need information about the class small icon.
 

Syntax

BOOL GetClassInfoA(
  HINSTANCE   hInstance,
  LPCSTR      lpClassName,
  LPWNDCLASSA lpWndClass
);

Parameters

hInstance

Type: HINSTANCE

A handle to the instance of the application that created the class. To retrieve information about classes defined by the system (such as buttons or list boxes), set this parameter to NULL.

lpClassName

Type: LPCTSTR

The class name. The name must be that of a preregistered class or a class registered by a previous call to the RegisterClass or RegisterClassEx function.

Alternatively, this parameter can be an atom. If so, it must be a class atom created by a previous call to RegisterClass or RegisterClassEx. The atom must be in the low-order word of lpClassName; the high-order word must be zero.

lpWndClass

Type: LPWNDCLASS

A pointer to a WNDCLASS structure that receives the information about the class.

Return Value

Type: Type: BOOL

If the function finds a matching class and successfully copies the data, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Requirements

   
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header winuser.h (include Windows.h)
Library User32.lib
DLL User32.dll

See Also

Conceptual

GetClassInfoEx

GetClassLong

GetClassName

Reference

RegisterClass

RegisterClassEx

WNDCLASS

Window Classes