MQL4 Add indicator to chart from EA - page 5

#import "user32.dll"
int RegisterWindowMessageW(string MessageName);
int PostMessageW(int hwnd,int msg,int wparam,uchar &Name[]);
#import

#define INDICATOR_NAME "Indicator_name"
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void StartCustomIndicator(int hWnd,string IndicatorName,bool AutomaticallyAcceptDefaults=false)
  {
   uchar name2[];
   StringToCharArray(IndicatorName,name2,0,StringLen(IndicatorName));

   int MessageNumber=RegisterWindowMessageW("MetaTrader4_Internal_Message");
   int r=PostMessageW(hWnd,MessageNumber,15,name2);
   Sleep(10);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int OnInit()
  {
//---
// In my code where I launch the indicator
   int hWnd=WindowHandle(Symbol(),0);
   StartCustomIndicator(hWnd,INDICATOR_NAME);

   return(INIT_SUCCEEDED);
  }

Hi every body

above code works in a Expert ,How do I use from above codes in a Indicator ?

please help.

Removes an indicator with a specified name from the specified chart window. The command is added to chart message queue and executed only after all previous commands have been processed.

Parameters

chart_id

[in]  Chart ID. 0 denotes the current chart.

sub_window

[in]  Number of the chart subwindow. 0 denotes the main chart subwindow.

const indicator_shortname

[in]  The short name of the indicator which is set in the INDICATOR_SHORTNAMEproperty with the IndicatorSetString()function. To get the short name of an indicator use the ChartIndicatorName()function.

Return Value

Returns true if the command has been added to chart queue, otherwise false. To get errordetails use the GetLastError()function.

int OnInit()
  {
//---
// In my code where I launch the indicator
   int hWnd=WindowHandle(Symbol(),0);
   StartCustomIndicator(hWnd,INDICATOR_NAME);

   return(INIT_SUCCEEDED);
  }

This code work, but only in OnInit section. If i try transfer it to section CHARTEVENT_OBJECT_CLICK for launch with key, nothing happend. Can you help me ?

Hi I got this 

 Cannot call 'user32.dll::RegisterWindowMessageW', 'user32.dll' is not loaded

Can anyone help me?

Dear Alain , 

I used your code to add one indicator to all open charts. but it only added to the chart on which I run the EA. 

here is the code  , can you please modify your code to add the same indicator to all open charts ? 

please help 

BTW ( I tried it as EA and also as script , both added the indicator to only one chart ) :)

regards, 

#import "user32.dll"

int RegisterWindowMessageW(string MessageName);

int PostMessageW(int hwnd,int msg,int wparam,uchar &Name[]);

#import

#define INDICATOR_NAME "CCI_FILTER6C"

int NOS  ;

string suffix="";

string symbol[30];

long chartid[30];

//+------------------------------------------------------------------+

//+------------------------------------------------------------------+

//+------------------------------------------------------------------+ 

int OnStart()

   {   

       NOS=10;

          suffix="c";

       symbol[0]  = "AUDCAD" + suffix ; 

       symbol[1]  = "AUDCHF" + suffix ; 

       symbol[2]  = "AUDJPY" + suffix;  

       symbol[3]  = "AUDNZD" + suffix;  

       symbol[4]  = "AUDUSD" + suffix ; 

       symbol[5]  = "CADJPY" + suffix ; 

       symbol[6]  = "CHFJPY" + suffix;  

       symbol[7]  = "EURAUD" + suffix ;

       symbol[8]  = "EURCAD" + suffix ; 

       symbol[9]  = "EURCHF" + suffix;  

for(int is=0;is<NOS;is++)

     {

      int hWnd=WindowHandle(symbol[is],PERIOD_M30);

      StartCustomIndicator(hWnd,INDICATOR_NAME);

     }    

  return(0);   

}

   void StartCustomIndicator(int hWnd,string IndicatorName,bool AutomaticallyAcceptDefaults=true)

  {

   uchar name2[];

   StringToCharArray(IndicatorName,name2,0,StringLen(IndicatorName));

   int MessageNumber=RegisterWindowMessageW("MetaTrader4_Internal_Message");

   int r=PostMessageW(hWnd,MessageNumber,15,name2);

   Sleep(100);

  }

looking for this as well - has anyone figured out how to add multiple indicators from the same EA?

i want to add 2 https://docs.mql4.com/indicators/ima from the same EA

thanks