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Working with Procedures |
  
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Working with Procedures
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Working with Procedures |
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Overview
There are two types of procedures:
1. Local Procedures
A specific set of commands (processes), inside a program, that uses local, program or global variables to manipulate data. The local procedure can only be called inside the program it is contained in.
When creating a local procedure, you can define input and output parameters that are shared with the processes that call that local procedure.
See Local Procedures.
2. Global Procedures
A specific program used for recurring actions and can be reused in other projects.
This procedure does not use global variables to prevent conflicts with global variables being used in a program.
It can contain screens, controls, routines and local procedures. Basically, it can be considered as a standard program.
To exchange data between the program that called this procedure and the global procedure, it is mandatory to define "input" and "output" parameters.
A global procedure is reusable, meaning, you can create a global procedure in an MCL-Designer V4 project, export it into Library and, then, import it into other MCL-Designer V4 projects.
See Global Procedures.
If required, you can use the following shortcut to include a global or a local procedure to certain elements: a screen, a "routine in", a "routine out" or a control:
If you drag a previously created local procedure from the "Programs" tab onto a screen/control (specifically, the "Actions" tab) or a "routine in"/"routine out" (onto its "Routine" tab), it automatically adds a "call a Local Proc" process. See Working with Call Local Proc Process.
The same goes for the global procedure - if you drag one from the "Global Procedures" module onto those elements, with the addition of the "Event" tab of a global event, you will be adding a "Call Global Procedure" process to the intended element. See Working with Call Global Proc Process.