diff --git a/src/backend/call.c b/src/backend/call.c
new file mode 100644
index 0000000..8832626
--- /dev/null
+++ b/src/backend/call.c
@@ -0,0 +1,57 @@
+/* $Id$ */
+/* This file gets included by backend */
+#define CALL(NAME) \
+	static int _MwLL##NAME##CallInit(void) { \
+		int st; \
+\
+		if((st = MwLL##NAME##CallInitImpl()) != 0) return st; \
+\
+		MwLLCreate  = MwLLCreateImpl; \
+		MwLLDestroy = MwLLDestroyImpl; \
+\
+		MwLLPolygon = MwLLPolygonImpl; \
+		MwLLLine    = MwLLLineImpl; \
+\
+		MwLLAllocColor	= MwLLAllocColorImpl; \
+		MwLLColorUpdate = MwLLColorUpdateImpl; \
+		MwLLFreeColor	= MwLLFreeColorImpl; \
+\
+		MwLLGetXYWH = MwLLGetXYWHImpl; \
+		MwLLSetXY   = MwLLSetXYImpl; \
+		MwLLSetWH   = MwLLSetWHImpl; \
+\
+		MwLLSetTitle = MwLLSetTitleImpl; \
+\
+		MwLLPending   = MwLLPendingImpl; \
+		MwLLNextEvent = MwLLNextEventImpl; \
+\
+		MwLLCreatePixmap  = MwLLCreatePixmapImpl; \
+		MwLLPixmapUpdate  = MwLLPixmapUpdateImpl; \
+		MwLLDestroyPixmap = MwLLDestroyPixmapImpl; \
+		MwLLDrawPixmap	  = MwLLDrawPixmapImpl; \
+		MwLLSetIcon	  = MwLLSetIconImpl; \
+\
+		MwLLForceRender = MwLLForceRenderImpl; \
+\
+		MwLLSetCursor = MwLLSetCursorImpl; \
+		MwLLDetach    = MwLLDetachImpl; \
+		MwLLShow      = MwLLShowImpl; \
+\
+		MwLLMakePopup = MwLLMakePopupImpl; \
+\
+		MwLLSetSizeHints   = MwLLSetSizeHintsImpl; \
+		MwLLMakeBorderless = MwLLMakeBorderlessImpl; \
+\
+		MwLLSetBackground = MwLLSetBackgroundImpl; \
+\
+		MwLLFocus	= MwLLFocusImpl; \
+		MwLLGrabPointer = MwLLGrabPointerImpl; \
+\
+		MwLLSetClipboard = MwLLSetClipboardImpl; \
+		MwLLGetClipboard = MwLLGetClipboardImpl; \
+\
+		MwLLMakeToolWindow = MwLLMakeToolWindowImpl; \
+\
+		return 0; \
+	} \
+	int (*MwLL##NAME##CallInit)(void) = _MwLL##NAME##CallInit;