MessageBox (Yes/Cancel)

[Kristina Suh]

HI,, I have an EA that works great..

I added a Button to Close all trades, but I want to add a messagebox that confirms the entry.. 

EG..  Are you sure  Yes/No/Cancel.

But I can get the message box to come up, but when I hit Cancel it still closes the open orders.

I have searched the documentation, but can't find any examples of how it should be coded.

Any help would be gratefully appreciated.

int MessageBox(
   string Confirmation,
   string Caption=MB_OKCANCEL,
   int    Flag=2
   );
   
   
// Describe this function...
double CalculationSize()
  {
   LotSize = AccountBalance() * 0.00001;
   return 0;
  }
string strTF(int period)
  {
   switch(period)
     {
       //--
       case PERIOD_M1: return("M1");
       case PERIOD_M5: return("M5");
       case PERIOD_M15: return("M15");
       case PERIOD_M30: return("M30");
       case PERIOD_H1: return("H1");
       case PERIOD_H4: return("H4");
       case PERIOD_D1: return("D1");
       case PERIOD_W1: return("W1");
       case PERIOD_MN1: return("MN");
       //--
     }
   return(_Period);
  }  

 void OnChartEvent(const int id,         // Event ID
                  const long& lparam,   // Parameter of type long event
                  const double& dparam, // Parameter of type double event
                  const string& sparam  // Parameter of type string events
  )
  {
   if(id==CHARTEVENT_OBJECT_CLICK && sparam==name_closeall && TradesCount()>0 )
         {   
            MessageBox(Confirmation,"0",MB_OKCANCEL); 
            PlaySound("ok.wav"); 
            Print("Close All Button");
            CloseAllOpenPositions(MaxSlippage); 
            myOrderDelete();
            ObjectSetInteger(ChartID(),name_closeall,OBJPROP_STATE,0);
           
            
         } 

[Marco vd Heijden]

You have to analyze the return value of MessageBox function in order to know which button was clicked.

int result = MessageBox(Confirmation,"0",MB_OKCANCEL);

The return value is the code see:https://www.mql5.com/en/docs/constants/io_constants/messbconstants

 https://www.mql5.com/en/docs/common/messagebox

[Kristina Suh]

Marco vd Heijden:

You have to analyze the return value of MessageBox function in order to know which button was clicked.

The return value is the code see:https://www.mql5.com/en/docs/constants/io_constants/messbconstants

 https://www.mql5.com/en/docs/common/messagebox

HI Marco,

Thanks for your reply, but unfortunately i am still confused.

which section do I change to your coding.. i tried both, but am still getting errors.

should I be changing this coding to your code above or the second section?

int MessageBox(
   string Confirmation,
   string Caption="Close All",
   int    Flag=0
   );
   

2nd section:

 if(id==CHARTEVENT_OBJECT_CLICK && sparam==name_closeall && TradesCount()>0 )
         {   
            MessageBox("Confirmation","0",MB_OKCANCEL); 
            PlaySound("ok.wav"); 
            Print("Close All Button");
            CloseAllOpenPositions(MaxSlippage); 
            myOrderDelete();
            ObjectSetInteger(ChartID(),name_closeall,OBJPROP_STATE,0);
           
            
         } 

I tried this with both "Confirmation"

I still get the error "'MessageBox' - ambiguous call to overloaded function with the same parameters

without the "  "

i also get the error Confirmation - undeclared identifier

Thanks

[Marco vd Heijden]

int result = MessageBox("test");

if(result == IDOK)
{
Alert("OK button has been pressed");
}

if(result == IDCANCEL)
{
Alert("Cancel button has been pressed");
}

Please read the links i provided in my previous post.

[Kristina Suh]

Marco vd Heijden:

Please read the links i provided in my previous post.

Thanks..

Works great..