hwnd (HWND) - input
Target
msg (ULONG) - input
DM_RENDERCOMPLETE is the only valid message.
pdxfer (PDRAGTRANSFER) - input
fl (ULONG) - input
ulRsvd (ULONG) - input
fRetry (BOOL) - input
TRUE
In this case, DrgPostTransferMsg dispatches any messages in the queue by calling WinPeekMsg and WinDispatchMsg in a loop. The application can receive messages sent by other applications while it is trying to post drag transfer messages.
rc (BOOL) - returns
TRUE