Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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JDD_GETNUMDEVS
 
        This message is sent to get the number of devices supported by
        the driver.
 
        LONG lParam1
            Not used.
 
        LONG lParam2
            Not used.
 
Return value
        The return value is the maximum number of devices supported by
        the driver. This does not necessarily match the number of
        physical devices actually hooked up to the computer.
 
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