UE4 Windows Show Open File Dialog (.cpp)

#include "FileOpsBPLibrary.h"
#include <algorithm>
#include <string>
#include "FileOps.h"
#include "FileDialog.h"

bool UFileOpsBPLibrary::ShowOpenFileDialog(FString InitialDir, FString Title, bool UseFilter, FString& Filepath) {
    FileDialog* dialog = new FileDialog();
    dialog->FilterIndex = 1;
    InitialDir = InitialDir.Replace(TEXT("/"), TEXT("\\"));
    dialog->InitialDir = InitialDir.GetCharArray().GetData(); //cast FString to *TCHAR (not const *TCHAR)
    dialog->Title = Title.GetCharArray().GetData();

    if (UseFilter) {
        dialog->Filter = TEXT("Samurai Files (*.sam)\0*.sam\0All Files\0*.*\0\0");
    }

    if (dialog->ShowOpenFileDialog()) {
        Filepath = dialog->FileName;
        Filepath = Filepath.Replace(_T("\\"), _T("/"));
        return true;
    }
    return false;
}