diff --git a/client/include/app.h b/client/include/app.h
index 46c2df9e..783449a4 100644
--- a/client/include/app.h
+++ b/client/include/app.h
@@ -140,6 +140,11 @@ void app_alert(LG_MsgAlert type, const char * fmt, ...);
 
 typedef void * MsgBoxHandle;
 MsgBoxHandle app_msgBox(const char * caption, const char * fmt, ...);
+
+typedef void (*MsgBoxConfirmCallback)(bool yes, void * opaque);
+MsgBoxHandle app_confirmMsgBox(const char * caption,
+    MsgBoxConfirmCallback callback, void * opaque, const char * fmt, ...);
+
 void app_msgBoxClose(MsgBoxHandle * handle);
 
 typedef struct KeybindHandle * KeybindHandle;
diff --git a/client/src/app.c b/client/src/app.c
index 738c804c..19202fff 100644
--- a/client/src/app.c
+++ b/client/src/app.c
@@ -644,8 +644,20 @@ MsgBoxHandle app_msgBox(const char * caption, const char * fmt, ...)
 {
   va_list args;
   va_start(args, fmt);
-  MsgBoxHandle handle =
-    overlayMsg_show(caption, fmt, args);
+  MsgBoxHandle handle = overlayMsg_show(caption, NULL, NULL, fmt, args);
+  va_end(args);
+
+  core_updateOverlayState();
+
+  return handle;
+}
+
+MsgBoxHandle app_confirmMsgBox(const char * caption,
+    MsgBoxConfirmCallback callback, void * opaque, const char * fmt, ...)
+{
+  va_list args;
+  va_start(args, fmt);
+  MsgBoxHandle handle = overlayMsg_show(caption, callback, opaque, fmt, args);
   va_end(args);
 
   core_updateOverlayState();
diff --git a/client/src/overlay/msg.c b/client/src/overlay/msg.c
index 07aae88b..02694083 100644
--- a/client/src/overlay/msg.c
+++ b/client/src/overlay/msg.c
@@ -35,6 +35,8 @@ struct Msg
   char * caption;
   char * message;
   StringList lines;
+  MsgBoxConfirmCallback confirm;
+  void * opaque;
 };
 
 struct MsgState
@@ -115,13 +117,42 @@ static int msg_render(void * udata, bool interactive, struct Rect * windowRects,
   }
 
   igNewLine();
-  igCalcTextSize(&textSize, "OK", NULL, false, 0.0);
-  ImGuiStyle * style = igGetStyle();
-  textSize.x += (style->FramePadding.x * 2.0f) * 8.0f;
-  textSize.y += (style->FramePadding.y * 2.0f) * 1.5f;
-  igSetCursorPosX((igGetWindowWidth() * 0.5f) - (textSize.x * 0.5f));
 
-  if (igButton("OK", textSize))
+  bool destroy = false;
+  if (msg->confirm)
+  {
+    igCalcTextSize(&textSize, "Yes", NULL, false, 0.0);
+    ImGuiStyle * style = igGetStyle();
+    textSize.x += (style->FramePadding.x * 2.0f) * 8.0f;
+    textSize.y += (style->FramePadding.y * 2.0f) * 1.5f;
+    igSetCursorPosX((igGetWindowWidth() * 0.5f) - textSize.x);
+
+    if (igButton("Yes", textSize))
+    {
+      destroy = true;
+      msg->confirm(true, msg->opaque);
+    }
+
+    igSameLine(0.0f, -1.0f);
+    if (igButton("No", textSize))
+    {
+      destroy = true;
+      msg->confirm(false, msg->opaque);
+    }
+  }
+  else
+  {
+    igCalcTextSize(&textSize, "OK", NULL, false, 0.0);
+    ImGuiStyle * style = igGetStyle();
+    textSize.x += (style->FramePadding.x * 2.0f) * 8.0f;
+    textSize.y += (style->FramePadding.y * 2.0f) * 1.5f;
+    igSetCursorPosX((igGetWindowWidth() * 0.5f) - (textSize.x * 0.5f));
+
+    if (igButton("OK", textSize))
+      destroy = true;
+  }
+
+  if (destroy)
   {
     ll_shift(l_msg.messages, NULL);
     freeMsg(msg);
@@ -149,7 +180,8 @@ bool overlayMsg_modal(void)
 }
 
 MsgBoxHandle overlayMsg_show(
-    const char * caption, const char * fmt, va_list args)
+    const char * caption, MsgBoxConfirmCallback confirm, void * opaque,
+    const char * fmt, va_list args)
 {
   struct Msg * msg = malloc(sizeof(*msg));
   if (!msg)
@@ -160,6 +192,8 @@ MsgBoxHandle overlayMsg_show(
 
   msg->caption = strdup(caption);
   msg->lines   = stringlist_new(false);
+  msg->confirm = confirm;
+  msg->opaque  = opaque;
   valloc_sprintf(&msg->message, fmt, args);
 
   char * token = msg->message;
diff --git a/client/src/overlay/msg.h b/client/src/overlay/msg.h
index f6bbd1ac..96c59844 100644
--- a/client/src/overlay/msg.h
+++ b/client/src/overlay/msg.h
@@ -29,7 +29,8 @@
 bool overlayMsg_modal(void);
 
 MsgBoxHandle overlayMsg_show(
-    const char * caption, const char * fmt, va_list args);
+    const char * caption, MsgBoxConfirmCallback confirm, void * opaque,
+    const char * fmt, va_list args);
 
 void overlayMsg_close(MsgBoxHandle * handle);