RealGetWindowClassW function (winuser.h)

Retrieves a string that specifies the window type.


UINT RealGetWindowClassW(
  [in]  HWND   hwnd,
  [out] LPWSTR ptszClassName,
  [in]  UINT   cchClassNameMax


[in] hwnd

Type: HWND

A handle to the window whose type will be retrieved.

[out] ptszClassName


A pointer to a string that receives the window type.

[in] cchClassNameMax

Type: UINT

The length, in characters, of the buffer pointed to by the pszType parameter.

Return value

Type: UINT

If the function succeeds, the return value is the number of characters copied to the specified buffer.

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


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
API set ext-ms-win-ntuser-windowclass-l1-1-1 (introduced in Windows 8.1)

See also

Windows Overview