ue4 游戏窗口置顶

"Slate", "SlateCore", "ApplicationCore"添加依赖

PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "HeadMountedDisplay",
        "Slate", "SlateCore", "ApplicationCore"});

#include "Windows/AllowWindowsPlatformTypes.h"
#include <windows.h>
#include <shellapi.h>
#include "Windows/HideWindowsPlatformTypes.h"

if (GEngine && GEngine->GameViewport && GEngine->GameViewport->GetWindow())
    {
        if (auto NativeWindowPtr = GEngine->GameViewport->GetWindow()->GetNativeWindow())
        {
           Windows::HWND handle = (Windows::HWND)NativeWindowPtr->GetOSWindowHandle();
          ::SetWindowPos(handle, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE |  SWP_NOMOVE);
        }
       
    }