/// <summary>
/// Enable a device.
/// </summary>
/// <param name="classGuid">The class guid of the device. Available in the device manager.</param>
/// <param name="instanceId">The device instance id of the device. Available in the device manager.</param>
public static void EnableDevice(Guid classGuid, string instanceId)
{
SafeDeviceInfoSetHandle diSetHandle = null;
try
{
// Get the handle to a device information set for all devices matching classGuid that are present on the system.
diSetHandle = NativeMethods.SetupDiGetClassDevs(ref classGuid, null, IntPtr.Zero, SetupDiGetClassDevsFlags.Present);
// Get the device information data for each matching device.
DeviceInfoData[] diData = GetDeviceInfoData(diSetHandle);
// Find the index of our instance.
int index = GetIndexOfInstance(diSetHandle, diData, instanceId);
// The size is just the size of the header, but we've flattened the structure.
// The header comprises the first two fields, both integer.
PropertyChangeParameters @params = new PropertyChangeParameters {
Size = 8, DiFunction = DiFunction.PropertyChange, Scope = Scopes.Global, StateChange = StateChangeAction.Enable
};
// Set Parameters
bool result = NativeMethods.SetupDiSetClassInstallParams(diSetHandle, ref diData[index], ref @params, Marshal.SizeOf(@params));
if (result == false)
{
throw new Win32Exception();
}
// Enable Device
result = NativeMethods.SetupDiCallClassInstaller(DiFunction.PropertyChange, diSetHandle, ref diData[index]);
if (result == false)
{
throw new ApplicationException("Failed to enable device!");
}
}
finally
{
if (diSetHandle != null)
{
if (diSetHandle.IsClosed == false)
{
diSetHandle.Close();
}
diSetHandle.Dispose();
}
}
}
internal static extern bool SetupDiSetClassInstallParams(SafeDeviceInfoSetHandle deviceInfoSet, [In] ref DeviceInfoData deviceInfoData, [In] ref PropertyChangeParameters classInstallParams, int classInstallParamsSize);
