'''This page is maintained for historic purposes. The keyword is [[Keywords currently not supported by QB64|not supported in QB64]].'''
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The [[IOCTL$]] function receives messages from an open device, format of the messages received is device dependent (see manual of the device to see if it is [[IOCTL]] compatible). Most devices are '''not''' [[IOCTL]] compatible.


{{PageSyntax}}
:{{Parameter|result$}} = [[IOCTL$]]([#]{{Parameter|fileNumber%}})


{{PageDescription}}
*'''[[Keywords currently not supported by QB64|Not supported in QB64.]]'''
* {{Parameter|fileNumber%}} is the file number for the [[OPEN]]ed device and {{Parameter|result$}} is the message received from the device.
*'''Note:''' The device must first be opened with the [[OPEN]] statement.


{{PageSeeAlso}}
* [[IOCTL]]
* [[OPEN]]

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