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1996-01-17
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OLE Automation Sample
SUMMARY
=======
The SPoly2 sample draws polygons. The only way to make SPoly2 draw a polygon
is to use its programmability interface.
One OLE automation object is exposed by Spoly2: spoly.application.
The object spoly2.application is associated with SPoly's main application
window. It controls drawing polygons and clearing the display.
MORE INFORMATION
================
SPoly2 implements IDispatch for spoly.application by using INTERFACEDATA,
DispGetIDsOfNames, and DispInvoke.
Methods defined on spoly2.application
-------------------------------------
Name Description
Draw Draw the polygon.
Reset Delete all points from the polygon.
AddPoint(X, Y) Add a point with coordinates (x,y) to the
polygon.
EnumPoints as VT_ENUM Return a collection of the polygon's points.
GetXOrigin as short Get the X origin of the polygon.
SetXOrigin(x as short) Set the X origin of the polygon.
GetYOrigin as short Get the Y origin of the polygon.
SetYOrigin(y as short) Set the Y origin of the polygon.
GetWidth as short Get the line width of the polygon.
SetWidth(width as short) Set the line width of the polygon.
Shortcomings of this sample
---------------------------
Many items in this sample should be properties. Instead, they are
implemented as methods. Anything which behaves like an attribute of the
object should be a property.
This is not a good example of how to implement a collection.