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GetRawInputDeviceList (user32)
.
C# Signature:
[StructLayout( LayoutKind.Sequential )]
public struct RAWINPUTDEVICELIST
{
public int hDevice;
public int dwType;
}
[DllImport("user32.dll")]
public static extern int GetRawInputDeviceList
(
IntPtr pRawInputDeviceList,
ref int puiNumDevices,
int cbSize
);
VB.Net Signature:
< StructLayout( LayoutKind.Sequential )> _
Public Structure RAWINPUTDEVICELIST
Public hDevice as Int32
Public dwType as UInt32
End Structure
<DllImport("user32.dll", CharSet:=CharSet.Auto,
EntryPOint:="GetRawInputDeviceList", SetLastError:=True)> _
Public Function GetRawInputDeviceList(ByVal pRawInputDeviceList As
IntPtr, ByRef puiNumDevices As Int32, ByVal cbSize As Int32) As Int32
End Function
VB Signature:
Declare Function GetRawInputDeviceList Lib "user32.dll" (ByVal pRawInputDeviceList As
IntPtr, ByRef puiNumDevices As Long, ByVal cbSize As Long) As Long
User-Defined Types:
None.
Alternative Managed API:
Notes:
None.
Tips & Tricks:
Sample Code:
//create a buffer on the unmanaged heap
int structSize = Marshal.SizeOf(typeof(RAWINPUTDEVICELIST));
new IntPtr((buffer.ToInt32() + (structSize * i))),typeof(RAWINPUTDEVICELIST));
...
}
The GetRawInputDeviceList function enumerates the raw input devices attached to the system.
1/22/2013 10:18:14 PM - gmartinnc-38.104.62.78
An IntPtr is a pointer to a memory location (unmanaged) that adapts to the platform it is running on (64-bit, etc.) UNLIKE a standard int/Integer. You should always use this type for unmanaged calls that require it, even though an int will appear to work on your development machine.
1/13/2008 4:00:13 AM - Damon Carr-72.43.165.29
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