audio_form object
This method will create a checkbox and return a control ID.
int create_checkbox(string caption, bool initial_value=false, bool read_only=false)
Parameters:
caption
The text for the checkbox.
initial_value
An optional parameter specifying the initial value for the checkbox. true is checked, false is unchecked.
read_only
An optional parameter indicating whether the checkbox should be read only. true means the checkbox will be read only, false means it can be modified.
Return value:
A control ID that can be used to check the status of the control, or -1 on error.
Remarks:
Prepending any letter in the caption string with an ampersand (&) sign will cause a shortcut to be created for the checkbox. For example, &Subscribe will cause alt+s to be the shortcut for the Subscribe checkbox.
Example:

    // Make a simple form with a few buttons and a checkbox.

    #include "form.bgt"

    audio_form form;

    void main()
    {
    form.create_window("Example Form", true);
    int subscribe=form.create_checkbox("&Subscribe", false, false);
    int ok=form.create_button("OK");
    int cancel=form.create_button("E&xit");
    while(true)
    {
    form.monitor();
    wait(5);
    if(form.is_pressed(ok))
    {
    exit();
    }
    if(form.is_pressed(cancel))
    {
    exit();
    }
    if((key_down(KEY_LMENU))&&(key_pressed(KEY_F4)))
    {
    exit();
    }
    }
    }