sander check this

event.c

@@ -20,6 +20,23 @@ KEYS
 
 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
 
+static void
+synconfig(Client *c, int x, int y, int w, int h, unsigned int border) {
+	XEvent synev;
+
+	synev.type = ConfigureNotify;
+	synev.xconfigure.display = dpy;
+	synev.xconfigure.event = c->win;
+	synev.xconfigure.window = c->win;
+	synev.xconfigure.x = x;
+	synev.xconfigure.y = y;
+	synev.xconfigure.width = w;
+	synev.xconfigure.height = h;
+	synev.xconfigure.border_width = border;
+	synev.xconfigure.above = None;
+	XSendEvent(dpy, c->win, True, NoEventMask, &synev);
+}
+
 static void
 movemouse(Client *c) {
 	int x1, y1, ocx, ocy, di;
@@ -34,10 +51,14 @@ movemouse(Client *c) {
 		return;
 	XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
 	for(;;) {
-		XMaskEvent(dpy, MOUSEMASK | ExposureMask, &ev);
+		XMaskEvent(dpy, MOUSEMASK | ExposureMask | StructureNotifyMask, &ev);
 		switch (ev.type) {
 		default:
 			break;
+		case ConfigureRequest:
+			synconfig(c, c->x, c->y, c->w, c->h, ev.xconfigure.border_width);
+			XSync(dpy, False);
+			break;
 		case Expose:
 			handler[Expose](&ev);
 			break;
@@ -50,6 +71,11 @@ movemouse(Client *c) {
 		case ButtonRelease:
 			XUngrabPointer(dpy, CurrentTime);
 			return;
+		case DestroyNotify:
+		case UnmapNotify:
+			XUngrabPointer(dpy, CurrentTime);
+			handler[ev.type](&ev);
+			return;
 		}
 	}
 }
@@ -68,10 +94,14 @@ resizemouse(Client *c) {
 		return;
 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w, c->h);
 	for(;;) {
-		XMaskEvent(dpy, MOUSEMASK | ExposureMask, &ev);
+		XMaskEvent(dpy, MOUSEMASK | ExposureMask | StructureNotifyMask, &ev);
 		switch(ev.type) {
 		default:
 			break;
+		case ConfigureRequest:
+			synconfig(c, c->x, c->y, c->w, c->h, ev.xconfigure.border_width);
+			XSync(dpy, False);
+			break;
 		case Expose:
 			handler[Expose](&ev);
 			break;
@@ -92,6 +122,11 @@ resizemouse(Client *c) {
 		case ButtonRelease:
 			XUngrabPointer(dpy, CurrentTime);
 			return;
+		case DestroyNotify:
+		case UnmapNotify:
+			XUngrabPointer(dpy, CurrentTime);
+			handler[ev.type](&ev);
+			return;
 		}
 	}
 }
@@ -145,23 +180,6 @@ buttonpress(XEvent *e) {
 	}
 }
 
-static void
-synconfig(Client *c, int x, int y, int w, int h, unsigned int border) {
-	XEvent synev;
-
-	synev.type = ConfigureNotify;
-	synev.xconfigure.display = dpy;
-	synev.xconfigure.event = c->win;
-	synev.xconfigure.window = c->win;
-	synev.xconfigure.x = x;
-	synev.xconfigure.y = y;
-	synev.xconfigure.width = w;
-	synev.xconfigure.height = h;
-	synev.xconfigure.border_width = border;
-	synev.xconfigure.above = None;
-	XSendEvent(dpy, c->win, True, NoEventMask, &synev);
-}
-
 static void
 configurerequest(XEvent *e) {
 	unsigned long newmask;