With CVI, I have configured my digital I/O line(DIG_Line_Config())and changed the state of that line (DIG_Out_Line()). How do I check later to see what the state of that line is? Is there a DIG_Line_Value() function?
No, there is no function to call to check the line state of a output digital line. One thing you can do for testing purposes is wire the digital output line you are testing to another line and read in the value of that line.