Question about “SetWaitCursor(1);”

Hi

Currently I study the program below and have some question needed advice:

A) What is the reason  to need “SetWaitCursor(1);” on the below code?

B) Does it cause a run time delay on the whole program? 

C) can we remove " SetWaitCursor(1);” from the below code?

code

//daqmx configure code

SetWaitCursor(1);

DAQmxErrchk (DAQmcCreateTask("",&taskHandle));

DAQmxErrchk (DAQmxcreateDIChan........