GetClassInfoExA function

Retrieves information about a window class, including a handle to the small icon associated with the window class. The GetClassInfo function does not retrieve a handle to the small icon.

Syntax

BOOL GetClassInfoExA(
  HINSTANCE     hInstance,
  LPCSTR        lpszClass,
  LPWNDCLASSEXA lpwcx
);

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.

lpszClass

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 a class atom created by a previous call to RegisterClass or RegisterClassEx. The atom must be in the low-order word of lpszClass; the high-order word must be zero.

lpwcx

Type: LPWNDCLASSEX

A pointer to a WNDCLASSEX 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 does not find a matching class and successfully copy the data, the return value is zero. To get extended error information, call GetLastError.

Remarks

Class atoms are created using the RegisterClass or RegisterClassEx function, not the GlobalAddAtom function.

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

GetClassLong

GetClassName

Reference

RegisterClass

RegisterClassEx

Window Classes