INT 2F - MS WINDOWS "WINOLDAP" - GET CLIPBOARD DATA SIZE
AX = 1704h
DX = clipboard format supported by WinOldAp (see AX=1703h)
Return:  DX:AX = size of data in bytes, including any headers
Failure: DX:AX = 0  no data in this format in the Clipboard


2F1704 - MS WINDOWS "WINOLDAP" - GET CLIPBOARD DATA SIZE