DDE structure.
This points to a dynamic data exchange structure. See DDESTRUCT.
Flags in the fsStatus field are set as follows:
DDE_FACKREQ
If this bit is 1, the receiving (client)
application is expected to send a WM_DDE_ACK
message after the memory object has been processed. If it is 0, the
client application should not send a WM_DDE_ACK
message.
DDE_FRESPONSE
If
this bit is 1, this data is offered in response to a WM_DDE_REQUEST
message. If it is 0, this data is offered in response to a WM_DDE_ADVISE
message.
offszItemName identifies which
data item is available.
offabData is the data. The format of the data is a registered DDE
data format, identified by the usFormat field.