Issue #100: implemented functions GetLastError, ResetLastError() in MtApi (MT5)

MT5Connector/MT5Connector.cpp

@@ -164,7 +164,7 @@ _DLLAPI int _stdcall sendStringResponse(int expertHandle, wchar_t* response, wch
 _DLLAPI int _stdcall sendVoidResponse(int expertHandle, wchar_t* err)
 {
     return Execute<int>([&expertHandle]() {
-        MtAdapter::GetInstance()->SendResponse(expertHandle, nullptr);
+        MtAdapter::GetInstance()->SendResponse(expertHandle, gcnew MtResponseObject(nullptr));
         return 1;
     }, err, 0);
 }

MtApi5/Mt5CommandType.cs

@@ -107,8 +107,6 @@ namespace MtApi5
         BacktestingReady                    = 66,
         IsTesting                           = 67,
 
-        Print                               = 68,
-
         //Requests
         MtRequest                           = 155,
 
@@ -179,6 +177,25 @@ namespace MtApi5
         TimeLocal                           = 129,
         TimeGMT                             = 130,
 
-        IndicatorRelease                    = 131
+        IndicatorRelease                    = 131,
+
+        //Checkup
+        GetLastError                        = 132,
+        TerminalInfoInteger                 = 133,  //TODO
+        TerminalInfoDouble                  = 134,  //TODO
+        TerminalInfoString                  = 135,  //TODO
+
+        //Common Functions
+        Alert                               = 136,  //TODO
+        Comment                             = 137,  //TODO
+        GetTickCount                        = 138,  //TODO
+        GetMicrosecondCount                 = 139,  //TODO
+        MessageBox                          = 140,  //TODO
+        PeriodSeconds                       = 141,  //TODO
+        PlaySound                           = 142,  //TODO
+        Print                               = 68,
+        ResetLastError                      = 143,
+        SendNotification                    = 144,  //TODO
+        SendMail                            = 145   //TODO
     }
 }

MtApi5/MtApi5Client.cs

@@ -2352,6 +2352,26 @@ namespace MtApi5
 
         #endregion //Date and Time
 
+        #region Checkup
+
+        ///<summary>
+        ///Returns the value of the last error that occurred during the execution of an mql5 program.
+        ///</summary>
+        public int GetLastError()
+        {
+            return SendCommand<int>(Mt5CommandType.GetLastError, null);
+        }
+
+        ///<summary>
+        ///Sets the value of the predefined variable _LastError into zero.
+        ///</summary>
+        public void ResetLastError()
+        {
+            SendCommand<object>(Mt5CommandType.ResetLastError, null);
+        }
+
+        #endregion
+
         #endregion // Public Methods
 
         #region Properties

TestClients/MtApi5TestClient/MainWindow.xaml

@@ -294,15 +294,6 @@
                             Command="{Binding AccountInfoStringCommand}"
                             Content="AccountInfoString" HorizontalAlignment="Left" />
                     </Grid>
-                    <Grid Margin="10" Grid.Row="1">
-                        <Grid.ColumnDefinitions>
-                            <ColumnDefinition Width="*"/>
-                            <ColumnDefinition Width="Auto"/>
-                        </Grid.ColumnDefinitions>
-                        
-                        <TextBox Grid.Column="0" Text="{Binding MessageText}" Margin="5"/>
-                        <Button Grid.Column="1" Content="Print" Command="{Binding PrintCommand}" Margin="5"/>
-                    </Grid>
                 </Grid>
             </TabItem>
 
@@ -433,6 +424,29 @@
                     <Button Command="{Binding TimeGMTCommand}" Content="TimeGMT" Margin="2"/>
                 </WrapPanel>
             </TabItem>
+
+            <TabItem Header="Checkup and Common Functions">
+                <Grid>
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="*" />
+                        <RowDefinition Height="Auto" />
+                    </Grid.RowDefinitions>
+
+                    <WrapPanel VerticalAlignment="Top" Margin="5">
+                        <Button Command="{Binding GetLastErrorCommand}" Content="GetLastError" Margin="2"/>
+                        <Button Command="{Binding ResetLastErrorCommand}" Content="ResetLastError" Margin="2"/>
+                    </WrapPanel>
+
+                    <Grid Margin="10" Grid.Row="1">
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="*"/>
+                            <ColumnDefinition Width="Auto"/>
+                        </Grid.ColumnDefinitions>
+                        <TextBox Grid.Column="0" Text="{Binding MessageText}" Margin="5"/>
+                        <Button Grid.Column="1" Command="{Binding PrintCommand}" Content="Print" Margin="5"/>
+                    </Grid>
+                </Grid>
+            </TabItem>
         </TabControl>
 
         <Expander Grid.Row="2" Header="Console" IsExpanded="True">

TestClients/MtApi5TestClient/ViewModel.cs

@@ -60,6 +60,8 @@ namespace MtApi5TestClient
 
         public DelegateCommand PositionOpenCommand { get; private set; }
 
+        public DelegateCommand GetLastErrorCommand { get; private set; }
+        public DelegateCommand ResetLastErrorCommand { get; private set; }
         public DelegateCommand PrintCommand { get; private set; }
 
         public DelegateCommand iCustomCommand { get; private set; }
@@ -257,6 +259,8 @@ namespace MtApi5TestClient
             PositionOpenCommand = new DelegateCommand(ExecutePositionOpen);
 
             PrintCommand = new DelegateCommand(ExecutePrint);
+            GetLastErrorCommand = new DelegateCommand(ExecuteGetLastError);
+            ResetLastErrorCommand = new DelegateCommand(ExecuteResetLastError);
 
             iCustomCommand = new DelegateCommand(ExecuteICustom);
 
@@ -926,6 +930,18 @@ namespace MtApi5TestClient
             AddLog($"Print: message print in MetaTrader - {retVal}");
         }
 
+        private async void ExecuteGetLastError(object obj)
+        {
+            var retVal = await Execute(() => _mtApiClient.GetLastError());
+            AddLog($"GetLastError: last error = {retVal}");
+        }
+
+        private void ExecuteResetLastError(object obj)
+        {
+            _mtApiClient.ResetLastError();
+            AddLog("GetLastError: executed.");
+        }
+
         private async void ExecuteICustom(object o)
         {
             const string symbol = "EURUSD";

mq5/MtApi5.mq5

@@ -705,6 +705,14 @@ int executeCommand()
    case 131: //IndicatorRelease
       Execute_IndicatorRelease();
    break;
+   
+   case 132: //GetLastError
+      Execute_GetLastError();
+   break;
+   case 143: //ResetLastError
+      Execute_ResetLastError();
+   break;
+   
    default:
       Print("Unknown command type = ", commandType);
       sendVoidResponse(ExpertHandle, _response_error);
@@ -5508,6 +5516,31 @@ void Execute_IndicatorRelease()
       PrintResponseError("IndicatorRelease", _response_error);
    }
 }
+
+void Execute_GetLastError()
+{
+   int last_error = GetLastError();
+   
+#ifdef __DEBUG_LOG__
+   PrintFormat("%s: last_error = %d", __FUNCTION__, last_error);
+#endif
+
+   SEND_INT_RESPONSE(last_error, "GetLastError");
+}
+
+void Execute_ResetLastError()
+{
+   ResetLastError();
+   
+#ifdef __DEBUG_LOG__
+   PrintFormat("%s: called", __FUNCTION__);
+#endif
+   
+   if (!sendVoidResponse(ExpertHandle, _error))
+   {
+      PrintResponseError("ResetLastError", _response_error);
+   }
+}
    
 void PrintParamError(string paramName)
 {