audio_form object
This method will add or append text to an input box or status bar without interfering with any text that is already present.
bool add_text(int control_id, string text, int position=-1)
Parameters:
control_id
The control ID of the input box.
text
The text that is to be added.
position
An optional parameter specifying the 0-based position where the new text should be added. A value of -1 will append the text to the end of the original.
Return value:
true on success, false on failure.
Remarks:
None.
Example:

    // Make a simple form with a few buttons and an input box.

    #include "form.bgt"

    audio_form form;

    void main()
    {
    form.create_window("Example Form", true);
    int input=form.create_input_box("test", "Let's add!", "", 0, true, false);
    int ok=form.create_button("&Add");
    int cancel=form.create_button("E&xit");
    while(true)
    {
    form.monitor();
    wait(5);
    if(form.is_pressed(ok))
    {
    form.add_text(input, " text", 9);
    }
    if(form.is_pressed(cancel))
    {
    exit();
    }
    if((key_down(KEY_LMENU))&&(key_pressed(KEY_F4)))
    {
    exit();
    }
    }
    }