/// <summary>
/// This operation reads an 32-bit value from the address location specified in addr. The address
/// must be a valid memory address in the current process mapped by a previous MapAddress() call.
/// </summary>
/// <param name="addr">Specifies the source address to read the value.</param>
/// <returns></returns>
public long Peek64(IntPtr addr)
{
long value;
AgVisa32.viPeek64(mSession, addr, out value);
return(value);
}