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Declare Function HidD_GetFeature Lib "hid.dll" (ByVal HidDeviceObject As SafeFileHandle, out lpReportBuffer As Byte, ReportBufferLength As Int32) As Boolean
<DllImport("hid.dll", SetLastError:=True, CallingConvention:=CallingConvention.StdCall)> _
Public Shared Function HidD_GetFeature(hidDeviceObject As SafeFileHandle, ByVal reportBuffer As Byte(), ByVal reportBufferLength As UInt32) As Boolean
End Function
User-Defined Types:
None.
Alternative Managed API:
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Notes:
Return Value - True if succeeded, otherwise False.
For C# - Must include "using Microsoft.Win32.SafeHandles;".
For VB - Must include "Imports Microsoft.Win32.SafeHandles". The reportBuffer parameter must be ByVal. The call will fail with windows system error 23 if it is ByRef.
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Sample Code:
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ByVal is a VB keyword that specifies a variable to be passed as a parameter BY VALUE. In other words, if the function or sub changes the value of the internal variable, it does not change the value of the external variable that was passed to it.
4/25/2007 3:19:55 AM - josep1er@cmich.edu-141.209.229.179
ByRef is a VB keyword that specifies a variable to be passed as a parameter BY REFERENCE. In other words, the pointer to the variable is passed and any change to its value made within the function or sub will change its value outside the function/sub.
4/25/2007 3:19:29 AM - anonymous
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