Add messagebox to windows import too

Source/Engine/Tools/TextureTool/TextureTool.DirectXTex.cpp

@@ -8,6 +8,7 @@
 #include "Engine/Platform/File.h"
 #include "Engine/Platform/CriticalSection.h"
 #include "Engine/Platform/ConditionVariable.h"
+#include "Engine/Platform/MessageBox.h"
 #include "Engine/Graphics/RenderTools.h"
 #include "Engine/Graphics/Async/GPUTask.h"
 #include "Engine/Graphics/Textures/TextureData.h"
@@ -358,6 +359,7 @@ HRESULT LoadFromEXRFile(const StringView& path, DirectX::ScratchImage& image)
     free(pixels);
     return result;
 #else
+    MessageBox::Show(TEXT("EXR format is not supported."), TEXT("Import warning"), MessageBoxButtons::OK, MessageBoxIcon::Warning);
     LOG(Warning, "EXR format is not supported.");
     return E_FAIL;
 #endif