QPx_AcqTestProtocol
| QPx_AcqTestProtocol(acqProtocol):error | |||
|---|---|---|---|
 |
acqProtocol | Longint | Acquisition protocol ID |
 |
error | Longint | Error result |
Test the availability of an acquisition protocol
Tests if an acquisition protocol is available on the current machine and OS.
Parameter acqProtocol is the protocol to test. Use one of the acquisition protocol constants:
| qpx_AcqTWAINProtocol | 1 | TWAIN identifier |
| qpx_AcqPictureTransferProtocol | 2 | Picture Transfer Protocol identifier |
| qpx_AcqVideoProtocol | 4 | Video acquisition protocol identifier |
| qpx_AcqICScannerProtocol | 8 | Mac OS Image Capture Scanner protocol identifier |
If the specified protocol is available, the command returns qpx_NoErr. If the protocol is not available, error qpx_couldntGetRequiredComponent is returned. If acqProtocol is unknown (none of the above constants), the command returns qpx_paramErr.