nf-dbgeng-idebugdataspaces4-readio.md

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NF:dbgeng.IDebugDataSpaces4.ReadIo	IDebugDataSpaces4::ReadIo (dbgeng.h)	The ReadIo method reads from the system and bus I/O memory.	debugger\readio.htm	debugger	05/03/2018	IDebugDataSpaces4::ReadIo	IDebugDataSpaces interface [Windows Debugging],ReadIo method, IDebugDataSpaces2 interface [Windows Debugging],ReadIo method, IDebugDataSpaces2::ReadIo, IDebugDataSpaces3 interface [Windows Debugging],ReadIo method, IDebugDataSpaces3::ReadIo, IDebugDataSpaces4 interface [Windows Debugging],ReadIo method, IDebugDataSpaces4.ReadIo, IDebugDataSpaces4::ReadIo, IDebugDataSpaces::ReadIo, IDebugDataSpaces_a6189a47-dc48-44cf-aadd-61769085ebc5.xml, ReadIo, ReadIo method [Windows Debugging], ReadIo method [Windows Debugging],IDebugDataSpaces interface, ReadIo method [Windows Debugging],IDebugDataSpaces2 interface, ReadIo method [Windows Debugging],IDebugDataSpaces3 interface, ReadIo method [Windows Debugging],IDebugDataSpaces4 interface, dbgeng/IDebugDataSpaces2::ReadIo, dbgeng/IDebugDataSpaces3::ReadIo, dbgeng/IDebugDataSpaces4::ReadIo, dbgeng/IDebugDataSpaces::ReadIo, debugger.readio	dbgeng.h	Dbgeng.h	Desktop															Windows		IDebugDataSpaces4::ReadIo dbgeng/IDebugDataSpaces4::ReadIo	APIRef kbSyntax	COM	dbgeng.h	IDebugDataSpaces4::ReadIo

IDebugDataSpaces4::ReadIo

-description

The ReadIo method reads from the system and bus I/O memory.

-parameters

-param InterfaceType [in]

Specifies the interface type of the I/O bus. This parameter may take values in the INTERFACE_TYPE enumeration defined in wdm.h.

-param BusNumber [in]

Specifies the system-assigned number of the bus. This is usually zero, unless the system has more than one bus of the same interface type.

-param AddressSpace [in]

This parameter must be equal to one.

-param Offset [in]

Specifies the I/O address within the address space.

-param Buffer [out]

Receives the data read from the I/O bus.

-param BufferSize [in]

Specifies the size in bytes of the buffer Buffer. This is the maximum number of bytes that will be read. At present, this must be 1, 2, or 4.

-param BytesRead [out, optional]

Receives the number of bytes returned read from the I/O bus. If BytesRead is NULL, this information is not returned.

-returns

Return code	Description
S_OK	The method was successful.

 

This method can also return error values. See Return Values for more details.

-remarks

This method is only available in kernel-mode debugging.