WindowScreenShot - MQL4 Documentation

MQL4 Reference Window functions WindowScreenShot

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bool WindowScreenShot(

string filename, int size_x, int size_y, int start_bar=-1, int chart_scale=-1, int chart_mode=-1)

Saves current chart screen shot as a GIF file. Returns FALSE if it fails. To get the error code, one has to use the GetLastError() function.
The screen shot is saved in the terminal_dir\experts\files (terminal_dir\tester\files in case of testing) directory or its subdirectories.

Parameters:

filename	-	Screen shot file name.
size_x	-	Screen shot width in pixels.
size_y	-	Screen shot height in pixels.
start_bar	-	Index of the first visible bar in the screen shot. If 0 value is set, the current first visible bar will be shot. If no value or negative value has been set, the end-of-chart screen shot will be produced, indent being taken into consideration.
chart_scale	-	Horizontal chart scale for screen shot. Can be in the range from 0 to 5. If no value or negative value has been set, the current chart scale will be used.
chart_mode	-	Chart displaying mode. It can take the following values: CHART_BAR (0 is a sequence of bars), CHART_CANDLE (1 is a sequence of candlesticks), CHART_LINE (2 is a close prices line). If no value or negative value has been set, the chart will be shown in its current mode.

Sample:

  int lasterror=0;
  //---- tester has closed one or more trades
  if(IsTesting() && ExtTradesCounter<TradesTotal())
    {
     //---- make WindowScreenShot for further checking
     if(!WindowScreenShot("shots\\tester"+ExtShotsCounter+".gif",640,480))
        lasterror=GetLastError();
     else ExtShotsCounter++;
     ExtTradesCounter=TradesTotal();
    }

WindowRedraw WindowTimeOnDropped