I tried to translate some new part of winuser.h header to Delphi. Why this structure is expected to be 48 bytes (only this size was accepted by the corresponding function). With 4-bytes boundary, it looks like it should have 40 bytes.

  typedef struct tagGESTUREINFO {
      UINT cbSize;                    
      DWORD dwFlags;                  
      DWORD dwID;                     
      HWND hwndTarget;                
      POINTS ptsLocation;             
      DWORD dwInstanceID;             
      DWORD dwSequenceID;             
      ULONGLONG ullArguments;         
      UINT cbExtraArgs;               
  } GESTUREINFO, *PGESTUREINFO;

If it's related to 8-bytes boundary? if so is it relevant to any case where ULONGLONG appears structures?

Thanks