C / C++ / MFC

typedef union tagCY {
    struct {
#ifdef _MAC
        long      Hi;
        long Lo;
#else
        unsigned long Lo;
        long      Hi;
#endif
    };
    LONGLONG int64;
} CY;

IFont::get_Size
Retrieves the point size of the font expressed in a 64-bit CY variable. The upper 32-bits of this value contains the
integer point size and the lower 32-bits contains the fractional point size.

HRESULT get_Size(
  CY* psize  //Pointer to the font size.
);
 
Parameters
psize 
[out] Pointer to the caller-allocated variable that receives the size. 
Return Values
The method supports the standard return value E_UNEXPECTED, as well as the following: 

S_OK 
The size was retrieved successfully. 
E_POINTER 
The address in psize is not valid. For example, it may be NULL.

CY CYsize;
pIFont->get_Size(&CYsize);
int Height = CYSize.Hi;