Hello, i am trying to figure out _WinAPI_WriteFile syntax ,my goal is to create a script that i can determine the write block size and and even throttle IO/SEC or Mbytes/sec ,finally measure disk throughput & latency . each operation will be measured and calculated by TimerInit /TimerDiff i wonder if _WinAPI_WriteFile is the right function to do ,if yes i would like to get help with examples. please advice Thanks