Add Missing XUI C++ Files

Minecraft.Client/Common/XUI/XUI_Ctrl_LoadingProgress.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "XUI_Ctrl_ProgressCtrlBase.h"
+
+class CXuiCtrlLoadingProgress : public CXuiCtrlProgressCtrlBase
+{
+public:
+	// Define the class. The class name must match the ClassOverride property
+	// set for the scene in the UI Authoring tool.
+	XUI_IMPLEMENT_CLASS( CXuiCtrlLoadingProgress, L"CXuiCtrlLoadingProgress", XUI_CLASS_PROGRESSBAR  )
+
+	XUI_BEGIN_MSG_MAP()
+		XUI_ON_XM_GET_SOURCE_TEXT(OnGetSourceDataText)
+	XUI_END_MSG_MAP()
+
+	virtual int GetValue();
+	virtual void GetRange(int *pnRangeMin, int *pnRangeMax);
+};