This field allow a maximum number of bytes to be specified for the text memo. Note that the mechanism for determining when the limit is reached is not perfect, and only operates during the processing of normal keystrokes. It does not operate during the paste operation, nor during the memo load, nor during replacement operations. (These loopholes may be closed in a later release.) Also, the field only supports a limit of up to 64K, on the theory that the space in the txtctl structure is more valuable than the likelihood of somebody wanting to set a limit of more than 64K. However, if you see a problem with that, please comment back to the developer.