If you are linking your DAL invocations into an image, the VMS linker will automatically resolve a reference to GTM$INIT by including the GTM_MAIN module from the GTMLIB.OLB library. On the other hand, if your DAL calls are in an image that doesn't include GTM_MAIN and GTM$INIT and that cannot be relinked, you must create a separate shareable image to hold them. Such images typically use the lib$find image_symbol library routine to dynamically activate additional shareable images. All other DAL functions are already packaged in GTMSHR.EXE so this technique does not apply to them.

Example:

	$ LINK/SHARE=GTMINIT.EXE GTM$DIST:GTMLIB/INCL=GTM_MAIN,SYS$INPUT/OPT
	Symbol_vector = (GTM$INIT = PROCEDURE)
	

The above example creates a shareable image named GTMINIT containing GTM$INIT. GTMINIT must be in SYS$LIBRARY or must be an executive mode logical name pointing to the location of GTMINIT.EXE.

Example:

	#include descrip
	getgtm()
	{
	$DESCRIPTOR(fil,"GTMINIT");
	/* shareable image name for GTM$INIT */
	$DESCRIPTOR(symb,"GTM$INIT");
	/* symbol name in image GTM$INIT */
	long (*init_addr)();
	/* resulting pointer to call handle */
	long status;
	status = lib$find_image_symbol(&fil,&symb,&init_addr);
	if ((status & 1) == 0)
	return status;
	status = (*init_addr)();
	return status;
	}
	

This C program uses the lib$find_image_symbol VMS system service to gain access to GTM$INIT.