GPIB/GPIB-488.2 Library Chapter 4
LabWindows/CVI Standard Libraries 4-14 © National Instruments Corporation
CloseInstrDevs
int result = CloseInstrDevs (char *instrumentPrefix);
Purpose
Closes instrument devices.
Parameter
Input instrumentPrefix string Must be null-terminated.
Return Value
result integer Result of the close instrument
devices operation.
Return Codes
0Success.
Using This Function
Closes all devices associated with the instrument module whose prefix is specified.
instrumentPrefix is a string that specifies the prefix of the instrument module being closed.
CloseInstrDevs always returns zero. CloseInstrDevs should be used only in
conjunction with OpenDev.
ibInstallCallback
int status = ibInstallCallback (int boardOrDevice, int eventMask,
GPIBCallbackPtr callbackFunction,
void *callbackData)
Note: This function is available only on Microsoft Windows. On UNIX, use the ibsgnl
function. On Windows 3.1, the data type of the return value and the first two
parameters is short rather than int.
Purpose
This function allows you to install a synchronous callback function for a specified board or
device. If you want to install an asynchronous callback, use the ibnotify function instead.