/// <summary>
/// Gets a parameter of the interface whose data type is <see cref="int"/>.
///
/// Possible Win32 errors:
/// ERROR_ACCESS_DENIED: The caller does not have sufficient permissions to perform the requested operation.
/// ERROR_INVALID PARAMETER: hClientHandle is NULL or invalid, pInterfaceGuid is NULL, pReserved is not NULL, ppData is NULL, or pdwDataSize is NULL.
/// ERROR_INVALID_HANDLE: The handle hClientHandle was not found in the handle table.
/// ERROR_INVALID_STATE: OpCode is set to wlan_intf_opcode_current_connection and the client is not currently connected to a network.
/// ERROR_NOT_ENOUGH_MEMORY: Failed to allocate memory for the query results.
/// RPC_STATUS: Various error codes.
/// </summary>
/// <param name="opCode">The opcode of the parameter.</param>
/// <returns>The integer value.</returns>
private int GetInterfaceInt(WlanIntfOpcode opCode)
{
IntPtr valuePtr;
int valueSize;
WlanOpcodeValueType opcodeValueType;
WlanInterop.ThrowIfError(WlanInterop.WlanQueryInterface(client.clientHandle, info.interfaceGuid, opCode, IntPtr.Zero, out valueSize, out valuePtr, out opcodeValueType));
try
{
return(Marshal.ReadInt32(valuePtr));
}
finally
{
WlanInterop.WlanFreeMemory(valuePtr);
}
}