When to define functions in C?

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dwtfetchinterfacemodule

DwtFetchInterfaceModule(3Dwt)											     DwtFetchInterfaceModule(3Dwt)

Name
       DwtFetchInterfaceModule - Fetches all the widgets defined in an interface module in the UID hierarchy.

Syntax
       #include <X11/DwtAppl.h>
       Cardinal DwtFetchInterfaceModule(hierarchy_id, module_name,
					parent_widget, widget_return)
	    DRMHierarchy hierarchy_id;
	    char *module_name;
	    Widget parent_widget;
	    Widget *widget_return;

Arguments
       hierarchy_id
		 Specifies  the  ID of the UID hierarchy that contains the interface definition.  The hierarchy_id was returned in a previous call
		 to DwtOpenHierarchy.

       module_name
		 Specifies the name of the interface module, which you specified in the UIL module header.  By convention,  this  is  usually  the
		 generic name of the application.

       parent_widget
		 Specifies the parent widget ID for the topmost widgets being fetched from the module.	The topmost widgets are those that have no
		 parents specified in the UIL module.  The parent widget is usually the top-level widget returned by XtInitialize.

       widget_return
		 Returns the widget ID for the last main window widget encountered in the UIL module, or NULL if no main window widget is found.

Description
       The DwtFetchInterfaceModule function fetches all the widgets defined in a UIL module in the UID hierarchy.  Typically, each application has
       one  or	more  modules  that  define  its interface.  Each must be fetched in order to initialize all the widgets the application requires.
       Applications do not need to define all their widgets in a single module.

       If the module defines a main window widget, DwtFetchInterfaceModule returns its widget ID.  If no main window widget is	contained  in  the
       module, DwtFetchInterfaceModule returns NULL and no widgets are realized.

       The application can obtain the IDs of widgets other than the main window widget by using creation callbacks.

Return Values
       This function returns one of these status return constants:

       DRMSuccess	 The   function   executed
			 successfully.
       DRMFailure	 The function failed.
       DRMNotFound	 The interface	module	or
			 topmost widget not found.

														     DwtFetchInterfaceModule(3Dwt)

Programming