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For any field that may contain only a single string type value we may use the gadget_getSingleValue routinegetSingleValue routine. 

gadget_createInput("Enter keyword", "demo");

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 For an above script that creates a multi select list the selected values may be obtained with the gadget_getMultiValues getMultiValues routine:

string[] res = gadget_getMultiValues(argv, "Multiselect");
//res[0] = a
//res[1] = c
//res[2] = e

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To retrieve the values entered in the field above we need to use the gadget_getMultiUserPicker getMultiUserPicker routine like this:

string[] res = gadget_getMultiUserPickerValue(argv, "MultiUserPicker");
//res[0] = admin
//res[1] = demouser

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