Wrote a C version of xtest.go. I need to somehow restore the .net error handler in the Go code...

wpf/xtest.c

@@ -0,0 +1,23 @@
+// 25 november 2015
+#include <stdio.h>
+#include "../ui.h"
+int onClosing(uiWindow *w, void *data)
+{
+	printf("in closing\n");
+	uiQuit();
+	return 1;
+}
+int main(void)
+{
+	uiInitOptions o;
+	uiWindow *w;
+	if (uiInit(&o) != NULL) return 1;
+	w = uiNewWindow("Hello from C",
+		320, 240, 0);
+	uiWindowOnClosing(w, onClosing, NULL);
+	uiControlShow(uiControl(w));
+	uiMain();
+	printf("after main\n");
+	uiUninit();
+	printf("out\n");
+}