The purpose of this application is to provide a tool that allows the user to
dynamically change COM1 through COM4 hardware configurations. It implements
Category 1 ASYNC (RS232-C) Control IOCtl commands. These commands are
further explained in section 18 of the Physical Device Drive Reference
manual.

If you have ever read this section and tried to implement or understand the
relationships between these functions, you know some things are not obvious.
Thus, the creation of "IOCTLPM". This is a PM application that implements
all the IOCtl commands via pull down menus and button selections. The 
following is a list of all the functions implemented: 

        Function 41h    Set Bit Rate
        Function 42h    Set Line Characteristics    
        Function 43h    Extended Set Bit Rate
        Function 44h    Transmit Byte Immediate
        Function 45h    Sete Break ON
        Function 46h    Set Modem Control Signals
        Function 47h    Behave as if XOFF Received
        Function 48h    Behave as if XON Received
        Function 4Bh    Set Break ON
        Function 53h    Set DCB Parameters
        Function 54h    Set Enhanced Mode Parameters
        Function 61h    Query Bit Rate
        Function 62h    Query Line Characteristics
        Function 63h    Extended Query Bit Rate
        Function 64h    Query COM Status
        Function 65h    Query Transmit Data Status
        Function 66h    Query Modem Output Signals
        Function 67h    Query Modem Input Signals
        Function 68h    Query Number of Characters in Receive Queue
        Function 69h    Query Number of Characters in Transmit Queue
        Function 6Dh    Query COM Error
        Function 72h    Query COM Event Information
        Function 73h    Query DCB Parameters
        Function 74h    Query Enhanced Mode Parameters

When Making selectings from the menus, each dialog box has the function
number displayed in the upper right corner. Not every function command
is displayed seperately. Most are combined, for example set DCB 
parameters and query DCB parameters.

USER NOTES:
-----------

1.      Values are entered in decimal. There is no range checking at this
        time.

2.      Since this application allows you to set any configuration using
        the above functions, you will get a debug message with "RC=31"
        return code for any invalid settings. You will also get this message
        if what you are trying to do conflicts with a previous setting.

3.      The RC return codes can be found in Appendix B of the Control
        Program Programming Reference manual.

I am interested in any feedback or problems encountered. Feel free to contact
me at:

                Dale Herrig
                Compuserv 72740,467