Measurement Computing WaveBook rev.3.0 - Manual (Page 218)

D-22 daqX API - Command Reference, 6-24-99 WaveBook User’s Manual
daqFormatError
DLL Function daqCalSelectInputSignal(DaqHandleT handle, DaqCalInputT input);
C daqCalSelectInputSignal(DaqHandleT handle, DaqCalInputT input);
Visual BASIC VBdaqCalSelectInputSignal(ByVal handle&, ByVal input as DaqCalInputT )
Delphi daqCalSelectInputSignal( handle: DaqHandleT; input: DaqCalInputT)
daqError Daq* Enhanced API error code Parameters
msg Pointer to a string to return the error text
Returns DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also daqSetDefaultErrorHandler, daqSetErrorHandler, daqProcessError, daqGetLastError,
daqDefaultErrorHandler
Program References None
Used With All devices
Description
daqFormatError
returns the text-string equivalent for the specified error condition. The error condition is specified by the daqError
parameter. The error text will be returned in the character string pointed to by the msg parameter. The character string space must have
been previously allocated by the application before calling this function. The allocated character string should be, at minimum, 64 bytes in
length. For more information on specific error codes refer to the API Error Codes at end of this chapter.
daqGetDeviceCount
DLL Function daqGetDeviceCount(PDWORD deviceCount);
C daqGetDeviceCount(PDWORD deviceCount);
Visual BASIC VBdaqGetDevice&(deviceCount&)
Delphi daqGetDeviceCount( var deviceCount:DWORD )
Parameters deviceCount Pointer to which the device count is to be returned
Returns DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also daqGetDeviceList, daqGetDeviceProperties
Program References None
Used With All devices
Description
daqGetDeviceCount returns the number of currently configured devices. This function will return the number of devices currently
configured in the system. The devices do not need to be opened for this function to operate properly. If the number returned does not
seem appropriate, the device configuration list should be checked via the Daq* Configuration applet located in the Control Panel. Refer to
the configuration section in your device’s user manual for more details.
daqGetDeviceList
DLL Function daqGetDeviceList(DaqDeviceListT *deviceList, PDWORD deviceCount);
C daqGetDeviceList(DaqDeviceListT *deviceList, PDWORD deviceCount);
Visual BASIC VBdaqGetDeviceList(deviceList as DaqDeviceListT, deviceCount&)
Delphi daqGetDeviceList( var deviceList: DaqDeviceListT; var deviceCount: DWORD)
deviceList Pointer to memory location to which the device list is to be returned Parameters
deviceCount Number of devices returned in the device list
Returns DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also daqGetDeviceCount, daqGetDeviceProperties, daqOpen,
Program References None
Used With All devices
Description
daqGetDeviceList
returns a list of currently configured devices. This function will return the device names in the deviceList
parameter for the number of devices returned by the deviceCount parameter. Each deviceList entry contains a device name
consisting of up to 64 characters. The device name can then be used with the daqOpen function to open the specific device.
If the number returned does not seem appropriate, the device configuration list should be checked via the Daq* Configuration applet
located in the Control Panel. Refer to the configuration section in your device’s user manual for more details.