Not able to generate call stack using StackWalk64 API on 64 bit OS

Hi All,

I am trying to generate call stack using StackWalk64 API on 32-bit and 64-bit machine.

StackWalk64 API works fine for 32-bit machine but on the 64-bit machine after reading the first line of the call stack API  StackWalk64 returns FALSE.

Machine type is also changed to IMAGE_FILE_MACHINE_AMD64 but it is still not working.

 Please let us know how to generate the entire call stack by using the StackWalk64 API on 64 bit OS.

/* Init symbol information */

    bResult = SymInitialize(hProcess, PDB_DIR, TRUE);

    if(!bResult) {

        return 1;

    }

    /* Setup stack frame */

    (void)memset(&sFrame, 0, sizeof(sFrame));

    sFrame.AddrPC.Offset    = pExceptionPointers->ContextRecord->Eip;

    sFrame.AddrFrame.Offset = pExceptionPointers->ContextRecord->Ebp;

    sFrame.AddrStack.Offset = pExceptionPointers->ContextRecord->Esp;

    sFrame.AddrPC.Mode      = AddrModeFlat;

    sFrame.AddrFrame.Mode   = AddrModeFlat;

    sFrame.AddrStack.Mode   = AddrModeFlat;

    while( cntFrame < MAX_STACK_FRAME ) {

        bResult = StackWalk64 (IMAGE_FILE_MACHINE_I386,

                 hProcess,

                 hThread,

                 &sFrame,

                 &(pExceptionPointers->ContextRecord),

                 NULL,  /* optional */

                 NULL,  /* optional */

                 NULL,  /* optional */

                 NULL); /* optional */----API StackWalk64 gets failed after retrieving the first frame on 64 BIT OS-

        if(!bResult) {

            /* End of stack or Error */

            break;

        }