__UnusedScreen()          Find a free screen handle
__ScanScreens()           Find the handle of a specified screen label
__SetGMouse()             Initialize the mouse and set the cursor type
__DefineMouseWindow()     Set the area where the mouse can freely move
__FixMousePosition()      Move the mouse cursor to a new position
__SetEventShadow()        Set objct shadow color
__DefEventRegion()        Define a click region object
__ActEventRegion()        Toggles event region to active status
__FlaEventRegion()        Redraw an event object for flash effect (default activates)
__MovEventRegion()        Moves, activates and redisplays the specified event object
__DeaEventRegion()        Toggles event region to inactive status
__RelEventRegion()
__DefIconButton()         Define and optionally activate a super icon button
__ActIconButton()         Toggles the button to active and displays it
__DeaIconButton()         Toggles a button off
__ClrIconButton()         Clear an icon from the screen given the handle ID
__WaitForEvent()          Get a mouse click and return the handle number
__WaitForClick()          Get a mouse click from a specified object area
__HandleError()           Display handle error and quit
__HandleInRange()         Determine if handle number is in valid range
__FindUnusedHandle()      Find the next free handle
__ScanObjects()           Find the handle of a specified object
__FindObject()            Find the object of a specified handle