Queuing device read request until ExecuteQueuingAccess() is called .
Queuing is performed in a unit of WinGP SDK handle.
Function Name
INT WINAPI BeginQueuingWrite();
Argument
None
Return value (NULL)
Normal End: 0
Problem: Error code
Special Item
Do not call API to execute device write operations after calling BeginQueuingWrite() until the ExecuteQueuingAccess(). After these calling, cache write and direct write commands will be queued. However, cache write and direct write commands cannot be mixed.
To cancel a queuing command, call CancelQueuingAccess().
The maximum number of queuing commands is 1500, the maximum byte number is under 1 MB.