api_init()     Initialize API interface
api_level()    Define API revision level that application requires
api_pause()    Give other tasks a chance to run
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mal_close()    Close a mailbox
mal_lock()     Lock access to a resource
mal_me()       Get handle of current task's mailbox
mal_name()     Assign a global name to a mailbox
mal_new()      Create a new mailbox
mal_of()       Get handle of a given task's mailbox
mal_read()     Wait for next message
mal_unlock()   Unlock access to a resource
mal_write()    Send a message by value with status zero
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tsk_free()     Free a task and its window
tsk_me()       Get handle of current task
tsk_new()      Create a new task
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win_attr()     Set current output attribute
win_frame()    Enable/disable display of a window's frame
win_logattr()  Use logical/physical attributes
win_move()     Move physical window
win_new()      Create a new window
win_printf()   Write formatted data to a window
win_top()      Make window topmost in its application
win_unhide()   Mark a window as not hidden