Listing 1. Simple CDE GUI application

#include <stdlib.h>
#include <Xm/MessageB.h>
#include <Dt/Dts.h>
#include <Dt/Action.h>
void emailCB(Widget, XtPointer, XtPointer);
main(argc, argv)
	int	argc;
	char	**argv;
{
	Widget  topLevelShell, send, help, cancel;
	Arg	xargs[10];
	int	n;
	XmString title, greet, email;
	char *file = 2 == argc ? argv[1] : 
		"/etc/motd";
	char *description;
topLevelShell = XtInitialize(argv[0], "DtSend",
		NULL, 0, &argc, argv);
/* CDE Initialization */
	DtInitialize(XtDisplay(topLevelShell), 
		topLevelShell, argv[0], "DtSend");
	DtDbLoad();
	send = XmCreateMessageDialog(topLevelShell, 
		"send", NULL, 0);
	/*Get CDE's "DESCRIPTION" of the file*/
	description = DtDtsFileToAttributeValue(file, 
		"DESCRIPTION");
	title = XmStringCreateSimple("DtSend");
	greet = XmStringCreateLtoR(description);
	email  = XmStringCreateSimple("Email");
	XtVaSetValues(send,
		XmNdialogTitle,	title,
		XmNmessageString,     greet,
		XmNhelpLabelString,   email,
		NULL);
	XmStringFree(title);
	XmStringFree(greet);
	XmStringFree(email);
	cancel = XmMessageBoxGetChild(send, 
		XmDIALOG_CANCEL_BUTTON);
	XtUnmanageChild(cancel);
	XtAddCallback(send, XmNokCallback, exit, 
		NULL);
	XtAddCallback(send, XmNhelpCallback, emailCB, 
		file);
	XtManageChild(send);
	XtMainLoop();
}
void
emailCB(w, client_data, call_data)
	Widget w;
	XtPointer client_data;
	XtPointer call_data;
{
	DtActionInvocationID actionId;
	DtActionArg actionArgs[] = { DtACTION_FILE,
		(char *)client_data };
	actionId = DtActionInvoke(XtParent(w),
		"Compose",	/* action */
		actionArgs, 1,	/* action arguments 
				 * & count */
		(char *) NULL,	/* terminal options */
		(char *) NULL,	/* execution host */
		(char *) NULL,	/* context directory */
		True,	/* "use indicator" */
		NULL, NULL);	/* action callback &
				 * client data */
}