Pascal File Commands and C Compatibility

Hello,

  I am converting a C program to Pascal and have a few questions:

  First of all, if I open a file as a text file (using Assign and
Reset) and then use the pascal command GetFS -- can I then use Pascal
commands such as fdRead and fdSeek without having to first open it
with fdOpen?

  Second, are there Pascal commands compatible with the standard C
functions ftell() and rewind()?

Thank you!