diff -r 40d6af793c1a -r c254ed644edf ui/winui/window.cpp
--- a/ui/winui/window.cpp	Fri Feb 09 16:50:23 2024 +0100
+++ b/ui/winui/window.cpp	Sun Feb 11 13:59:02 2024 +0100
@@ -37,6 +37,7 @@
 #include "util.h"
 
 #include "../common/context.h"
+#include "../common/object.h"
 
 #include <stdlib.h>
 
@@ -204,6 +205,70 @@
 	}
 }
 
+
+
+
+static Windows::Foundation::IAsyncAction create_dialog_async(UiObject *obj, UiDialogArgs args) {
+	UiObject* current = uic_current_obj(obj);
+	Window parentWindow = current->wobj->window;
+
+	ContentDialog dialog = ContentDialog();
+	dialog.XamlRoot(parentWindow.Content().XamlRoot());
+
+	if (args.title) {
+		wchar_t *str = str2wstr(args.title, nullptr);
+		dialog.Title(winrt::box_value(str));
+		free(str);
+	}
+	if (args.content) {
+		wchar_t *str = str2wstr(args.content, nullptr);
+		dialog.Content(winrt::box_value(str));
+		free(str);
+	}
+
+	if (args.button1_label) {
+		wchar_t *str = str2wstr(args.button1_label, nullptr);
+		dialog.PrimaryButtonText(winrt::hstring(str));
+		free(str);
+	}
+	if (args.button2_label) {
+		wchar_t *str = str2wstr(args.button2_label, nullptr);
+		dialog.SecondaryButtonText(winrt::hstring(str));
+		free(str);
+	}
+	if (args.closebutton_label) {
+		wchar_t *str = str2wstr(args.closebutton_label, nullptr);
+		dialog.CloseButtonText(winrt::hstring(str));
+		free(str);
+	}
+
+	ContentDialogResult result = co_await dialog.ShowAsync();
+
+	if (args.result) {
+		UiEvent evt;
+		evt.obj = current;
+		evt.document = current->ctx->document;
+		evt.window = current->window;
+		evt.eventdata = NULL;
+		evt.intval = 0;
+		if (result == ContentDialogResult::Primary) {
+			evt.intval = 1;
+		} else if (result == ContentDialogResult::Secondary) {
+			evt.intval = 2;
+		}
+
+		args.result(&evt, args.resultdata);
+	}
+}
+
+UIEXPORT void ui_dialog_create(UiObject *obj, UiDialogArgs args) {
+	create_dialog_async(obj, args);
+}
+
+
+
+// --------------------------------------- File Dialog ---------------------------------------
+
 static void filedialog_callback(
 	UiObject *obj,
 	ui_callback file_selected_callback,