diff --git a/dialog_windows.go b/dialog_windows.go
index 21beee0..29124a2 100644
--- a/dialog_windows.go
+++ b/dialog_windows.go
@@ -79,15 +79,23 @@ var (
 func _msgBox(primarytext string, secondarytext string, uType uint32) (result int) {
 	// http://msdn.microsoft.com/en-us/library/windows/desktop/aa511267.aspx says "Use task dialogs whenever appropriate to achieve a consistent look and layout. Task dialogs require Windows Vista® or later, so they aren't suitable for earlier versions of Windows. If you must use a message box, separate the main instruction from the supplemental instruction with two line breaks."
 	text := primarytext + "\n\n" + secondarytext
-	r1, _, err := _messageBox.Call(
-		uintptr(_NULL),
-		uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(text))),
-		uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(os.Args[0]))),
-		uintptr(uType))
-	if r1 == 0 {		// failure
-		panic(fmt.Sprintf("error displaying message box to user: %v\nstyle: 0x%08X\ntitle: %q\ntext:\n%s", err, uType, os.Args[0], text))
+	ret := make(chan uiret)
+	defer close(ret)
+	uitask <- &uimsg{
+		call:		_messageBox,
+		p:		[]uintptr{
+			uintptr(_NULL),
+			uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(text))),
+			uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(os.Args[0]))),
+			uintptr(uType),
+		},
+		ret:		ret,
 	}
-	return int(r1)
+	r := <-ret
+	if r.ret == 0 {		// failure
+		panic(fmt.Sprintf("error displaying message box to user: %v\nstyle: 0x%08X\ntitle: %q\ntext:\n%s", r.err, uType, os.Args[0], text))
+	}
+	return int(r.ret)
 }
 
 func msgBox(primarytext string, secondarytext string) {
diff --git a/todo.md b/todo.md
index 5f7a2bb..cd48250 100644
--- a/todo.md
+++ b/todo.md
@@ -16,8 +16,6 @@ so I don't forget:
 - Combobox/Listbox.Select (with Listbox.Select allowing bulk)
 	- Checkbox.Check or Checkbox.SetChecked
 - Listbox.SelectAll
-- make the Windows implementation of message boxes run on uitask
-	- ensure MsgBoxError can run if initialization failed if things change ever
 - should Labels be selectable?
 	- should message box text be selectable on all platforms or only on those that make it the default?
 - Listbox/Combobox.Index(n)
@@ -25,7 +23,7 @@ so I don't forget:
 - change sysData.make() so it does not take the initial window text as an argument and instead have the respective Control/Window.make() call sysData.setText() expressly; this would allow me to remove the "no such concept of text" checks from the GTK+ and Mac OS X backends
 
 important things:
-- because the main event loop is not called if initialization fails, it is presently impossible for MsgBoxError() to work if UI initialization fails; this basically means we cannot allow initializiation to fail on Mac OS X if we want to be able to report UI init failures to the user with one
+- because the main event loop is not called if initialization fails, it is presently impossible for MsgBoxError() to work if UI initialization fails; this basically means we cannot allow initializiation to fail on Mac OS X if we want to be able to report UI init failures to the user with one (which would be desirable, maybe (would violate Windows HIG?))
 - figure out where to auto-place windows in Cocoa (also window coordinates are still not flipped properly so (0,0) on screen is the bottom-left)
 	- also provide a method to center windows; Cocoa provides one for us but
 - I think Cocoa NSButton text is not vertically aligned properly...?