/// <summary>
/// 创建会话
/// </summary>
/// <param name="conv_id">会话的 ID</param>
/// <param name="iMConvType">会话类型，请参考 TIMConvType</param>
/// <param name="handler">创建会话的回调</param>
public static TIMResult IMConvCreate(string conv_id, TIMConvType iMConvType, ConvCreateDelgate handler = null)
{
var ptr = DelegateConverter.ConvertToIntPtr(handler);
return((TIMResult)TIMClientAPIDef.TIMConvCreate(conv_id, iMConvType, ConvCreateResultCallBack, ptr));
}