System Class

    System.copyFile("dat://source.txt", "dat://destination.txt");

var location = System.path(#USER_DOCUMENTS);
if (!System.isDir(location+"/newFolder"))
    System.createDir(location+"/newFolder");  //create new folder in directory, where user's documents are saved usually
else;
    // this folder alredy exists

    var location = System.path(#USER_DOCUMENTS);
    if (System.isDir(location+"/newFolder"))
        System.deleteDir(location+"/newFolder");  //delete folder in directory, where user's documents are saved usually
    else;
        // this folder does not exists

var location = System.path(#USER_DOCUMENTS);
if (System.isFile(location+"/userFile.txt"))
    System.deleteFile(location+"/userFile.txt");  //delete file from directory, where user's documents are saved usually
else
    // this file does not exists

// "call-to"
System.exec ({
    command: "call-to",
    phone: "00421954444333";

});

//"mail-to"
System.exec ({
    command: "mail-to",
    to: "",
    cc: "carbon copy",
    bcc: "blind carbon copy",
    subject: "mail subject",
    body: "text of mail",
});

//"sms-to"
System.exec ({
    command: "sms-to",
    to: "00421954444333",
    text: "message text",
});

//"take-image"
var callBack = function(file)
{
    console<<file<<"\n"; // returns image location
}
System.exec({
    command: "take-image",
    file: "dat://image.jpg",
    callback: callBack,
});

//"show-image"
System.exec({
    command: "show-image",
    file: "dat://image.jpg",
});

var location = System.path(#USER_DOCUMENTS);
if (System.isFile(location+"/userFile.txt"))
    console<<"File size: " << System.getFileSize(location+"/userFile.txt") << "B\n";
else
    // this file does not exists

    // system keyboad is not supported in emulator
    if(System.IS_EMULATOR === false)
        System.hideKeyboard();

System.isDir("dat://folder/subfolder"); // returns true if subfolder exists

var location = System.path(#USER_DOCUMENTS);
if (!System.isDir(location+"/newFolder"))
    System.createDir(location+"/newFolder");  //create new folder in directory, where user's documents are saved usually
else;
    // this folder alredy exists

System.isFile("dat://folder/a.txt"); // returns true if file exists

var location = System.path(#USER_DOCUMENTS);
if (System.isFile(location+"/userFile.txt"))
    System.deleteFile(location+"/userFile.txt");  //delete file from directory, where user's documents are saved usually
else;
    // this file does not exists

var location = System.path(#USER_DOCUMENTS);
if (System.isFile(location+"/userFile.txt"))
    console<<"File size: " << System.getFileSize(location+"/userFile.txt") << "B\n";
else
    System.messageBox("this file does not exists");

// get location of “my documents” folder
var location = System.path(#USER_DOCUMENTS);
if (System.isFile(location+"/userFile.txt"))
    System.deleteFile(location+"/userFile.txt");  //delete file from directory, where user's documents are saved usually
else;
    // this file does not exists

function processKey(sender, key)
{
    console << "key on keyboard: " << key << "\n";
}
if (!System.requestKeyboard(processKey, #default)) {
    // use software keyboard
    // swKeyboard = new Keyboard();
    swKeyboard.visible = false;
}

function manage(name, flag)
{
    console<<"file name: "<<name<<" flag: "<<flag<<"\n";  // displays information about file
    return true;    // search for another file (return false for stop searching)
}
System.scanFiles("dat://folder/*.txt", manage); //search for txt files in dat://folder/ returns number of files