Compatibility:  WIN 3.0+
Expects: AX    1704H
DX    WinOldApp-supported clipboard data format code
                                                                  
Returns: DX:AX size, in bytes of the data, including any headers.
DX is the high word and AX is the low word.
0000:0000 means no data in format DX was found.
                                                                  
Info: This obtains the size of the data that is currently in the
clipboard.  Equivalent to GetClipboardDataSize.

Only a few data types are supported.  See Clipboard Data Formats.

On CF_BITMAP-formatted data (DX=0002H), the returned size will
include the size of the 24-byte header.

- -

INT 2fH 1704H: Query Size of Clipboard Data