The {{KW|IOCTL}} statement sends a message to an open IOCTL compatible device. 


{{PageSyntax}}
:{{KW|IOCTL}} [#]{{Parameter|fileNumber%}}, {{Parameter|message$}}


{{PageDescription}}
*'''[[Keywords currently not supported by QB64|Currently NOT supported in QB64!]]'''
* {{Parameter|fileNumber%}} is the number of an open device
* {{Parameter|message$}} is the message you want to send.
* The device must first be opened with the {{KW|OPEN}} statement.
* Use {{KW|IOCTL$}} to receive messages from the device.
* The message sent is device-specific (read manual to see if it is {{KW|IOCTL}} compatible).
* {{KW|IOCTL}} doesn't work with most devices, it doesn't work with BASIC devices (LPTn:, COMn:, SCRN:, CONS:) or DOS block devices (A: to Z:).


{{PageSeeAlso}}
* {{KW|IOCTL$}}
* {{KW|OPEN}}


{{PageNavigation}}