_inp, _inpw, _inpd

 

For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.

Inputs, from a port, a byte (_inp), a word (_inpw), or a double word (_inpd).

System_CAPS_ICON_important.jpg Important

These functions are obsolete. Beginning in Visual Studio 2015, they are not available in the CRT.

System_CAPS_ICON_important.jpg Important

This API cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported with /ZW.

int _inp(   
   unsigned short port   
);  
unsigned short _inpw(   
   unsigned short port   
);  
unsigned long _inpd(   
   unsigned short port   
);  

Parameters

port
I/O port number.

The functions return the byte, word, or double word read from port. There is no error return.

The _inp, _inpw, and _inpd functions read a byte, a word, and a double word, respectively, from the specified input port. The input value can be any unsigned short integer in the range 0 – 65,535.

Because these functions read directly from an I/O port, they might not be used in user code in Windows NT, Windows 2000, Windows XP, and Windows Server 2003.

RoutineRequired header
_inp<conio.h>
_inpw<conio.h>
_inpd<conio.h>

For more compatibility information, see Compatibility.

All versions of the C run-time libraries.

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.

Console and Port I/O
_outp, _outpw, _outpd

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