IDA Help: patch_qword

Change value of a quad word
     ea    - linear address
     value - new value of the quad word
Returns: 1 if the database has been modified,
         0 if either the debugger is running and the process' memory
           has value 'value' at address 'ea',
           or the debugger is not running, and the IDB
           has value 'value' at address 'ea' already.

success patch_qword(long ea, long value);