Index: order.h
===================================================================
--- order.h	(revision 27478)
+++ order.h	(revision 27479)
@@ -44,7 +44,10 @@
 struct pcb_order_imp_s {
 	const char *name;
 	int (*enabled)(pcb_order_imp_t *imp);          /* returns 1 if the plugin is enabled */
+	int (*load_fields)(pcb_order_imp_t *imp, order_ctx_t *octx);
+	void (*free_fields)(pcb_order_imp_t *imp, order_ctx_t *octx);
 	void (*populate_dad)(pcb_order_imp_t *imp, order_ctx_t *octx);
+	void *odata;                                   /* implementation-specific data of the current order */
 };
 
 extern vtp0_t pcb_order_imps; /* of (pcb_order_imp_t *) items */
@@ -51,4 +54,14 @@
 
 void pcb_order_reg(const pcb_order_imp_t *imp);
 
+/* Generic field handling */
+typedef struct pcb_order_field_s {
+	pcb_hid_attr_type_t type;
+	pcb_hid_attr_val_t val;
+	char **enum_vals;
+	int wid;                /* widget id, if any */
+	char name[1];           /* dynamic length */
+} pcb_order_field_t;
+
+
 #endif
Index: order_dlg.c
===================================================================
--- order_dlg.c	(revision 27478)
+++ order_dlg.c	(revision 27479)
@@ -35,10 +35,15 @@
 			PCB_DAD_COMPFLAG(order_ctx.dlg, PCB_HATF_EXPFILL | PCB_HATF_LEFT_TAB);
 			for(n = 0; n < pcb_order_imps.used; n++) {
 				imp = pcb_order_imps.array[n];
-				PCB_DAD_BEGIN_VBOX(order_ctx.dlg);
-					PCB_DAD_COMPFLAG(order_ctx.dlg, PCB_HATF_EXPFILL);
-					imp->populate_dad(pcb_order_imps.array[n], &order_ctx);
-				PCB_DAD_END(order_ctx.dlg);
+				if (imp->load_fields(pcb_order_imps.array[n], &order_ctx) == 0) {
+					PCB_DAD_BEGIN_VBOX(order_ctx.dlg);
+						PCB_DAD_COMPFLAG(order_ctx.dlg, PCB_HATF_EXPFILL);
+
+						imp->populate_dad(pcb_order_imps.array[n], &order_ctx);
+					PCB_DAD_END(order_ctx.dlg);
+				}
+				else
+					PCB_DAD_LABEL(order_ctx.dlg, "Failed to determine form fields");
 			}
 
 		PCB_DAD_END(order_ctx.dlg);