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The GetObjectIdByParam method allows receiving you to get the ID of an object ID at which , some parameter of which is equal to the specified value. The first found object ID is receiving if If there are several such objects. The null is receiving if , the ID of the first found object is returned. If no such objects are not found, 0 is returned.

Syntax of for method invocation:

function GetObjectIdByParam (obj_type : String, obj_param : String, param_value : String)

Method arguments:

1. obj_type – is a required argument. Specifies It specifies the type of system object, the ID of which is required you want to get.
2. obj_param – is a required argument. Specifies It specifies the name of the parameter in the database on , by the value of which you want to search for the object is to be found.
3. param_value – is a required argument. Specifies It specifies the required value of the object parameter.

Example. Find cameras from which with a black-and-white video image is receiving and set the the Color parameter equals to 1 for them.

if (Event.SourceType == "MACRO" && Event.SourceId== "1" && Event.Action == "RUN")
 
{
 var id = GetObjectIdByParam("CAM","color","0"); //receivingget the first object ID
 while (id){ //while exist the Camera objects from which black-and-white image is receivingreceived
   SetObjectParam ("CAM", id, "color", "1"); //change the Color parameter for found object
  id = GetObjectIdByParam("CAM","color","0"); //receivingget the next object ID
 }
}