maxim provides dll to communicate its signal conditioner ic max1452. This dll can be called in labview. Its type is c.Two functions are essentially to be called before programming the device with serial port. These two functions are findcom port which returns com port address and initialization sequence which makes device to learn baud rate.The code I have made doesn't run as it throws an exception error in external code.I have established serial port communication with an instrument where i have used basic serial write an read. that works fine.