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[amibroker] Export Image Question



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I was wondering if it is possible to have an AFL function that 
exports an image of the active window of the currently running AB.  
I put in the following code, but when it executes, I just get a gif 
that says: "ERROR: Formula execution halted because of an error - no 
chart to display."  I was thinking I could have the chart export an 
image when certain events occur.  Exporting from the menu works 
fine, but would like to automate.

EnableScript("jscript");
<%
function sshot(){
  AB = new ActiveXObject("Broker.Application");
  AB.ActiveWindow.ExportImage( "ss.gif", 640, 480 );
  AW = AB.ActiveWindow;
  AW.ExportImage( "C:\\Inetpub\\wwwroot\\ami\\ss.gif", 640, 480 );
}
%>  

script = GetScriptObject();
script.sshot();

Thanks




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