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

Type: LPTSTR

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.

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.

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