3. Programming Frames : How You Can Invoke Frames
 
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How You Can Invoke Frames
The callframe, openframe, and gotoframe statements invoke frames and provide options for executing additional frames. They differ in how they handle control and communication between frames and how they pass and return values.
However, there are also many similarities among these commands. One example is the process by which the calling frame can place the called frame into a particular state, presenting the user with continuity between frames.
This section presents the differences and similarities in the usage of these three statements.