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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.