Windows Native Toolkit | Message Box Library

Native Windows message-box and task-dialog nodes with synchronous and async variants.

Use this library for confirmations, diagnostics, launchers, setup prompts, and native modal dialogs.

Show Native Message Box

Shows a standard Windows message box immediately.

Pin	Direction	Purpose
`Title`	Input	Dialog window title.
`Message`	Input	Main message text.
`Buttons`	Input	Standard Windows button layout.
`Icon`	Input	Optional native icon style.
`Confirmed`	Output	Fires when the player clicks `OK` or `Yes`.
`Declined`	Output	Fires when the player clicks `No`.
`Canceled`	Output	Fires when the player cancels or closes the dialog.

C++ Example

  #include "MessageBoxWindows.h"

  EMessageBoxResult Result = EMessageBoxResult::Canceled;
  UNativeMessageBox::ShowNativeMessageBox(
      TEXT("Confirm"),
      TEXT("Continue?"),
      EMessageBoxButtons::YesNoCancel,
      EWNTMessageBoxIcon::Question,
      Result
  );

Show Native Message Box Async

Shows the same Windows message box on a worker thread and keeps Blueprint flow responsive.

Pin	Direction	Purpose
`WorldContextObject`	Input	Async action registration context.
`Title`	Input	Dialog window title.
`Message`	Input	Main message text.
`Buttons`	Input	Standard Windows button layout.
`Icon`	Input	Optional native icon style.
`Then`	Output	Continues immediately after the async action is created.
`On Confirmed`	Output	Fires when the player clicks `OK` or `Yes`.
`On Declined`	Output	Fires when the player clicks `No`.
`On Canceled`	Output	Fires when the player cancels or closes the dialog.

C++ Example

#include "MessageBoxWindows.h"

UFUNCTION()
void HandleDialogConfirmed();

UFUNCTION()
void HandleDialogDeclined();

UFUNCTION()
void HandleDialogCanceled();

UAsyncNativeMessageBoxAction* Action =
    UAsyncNativeMessageBoxAction::ShowNativeMessageBoxAsync(
        this,
        TEXT("Confirm"),
        TEXT("Continue?"),
        EMessageBoxButtons::YesNoCancel,
        EWNTMessageBoxIcon::Question);

Action->OnConfirmed.AddDynamic(this, &UMyObject::HandleDialogConfirmed);
Action->OnDeclined.AddDynamic(this, &UMyObject::HandleDialogDeclined);
Action->OnCanceled.AddDynamic(this, &UMyObject::HandleDialogCanceled);

Show Regular Message Box

Shows the custom native task-dialog version with your own button text.

Pin	Direction	Purpose
`Title`	Input	Dialog window title.
`Message`	Input	Main message text.
`Icon`	Input	Optional native icon style.
`FirstButtonText`	Input	Text shown on the primary button.
`SecondButtonText`	Input	Text shown on the secondary button.
`bShowSecondButton`	Input	Controls whether the second button is shown.
`First Button Clicked`	Output	Fires when the primary button is chosen.
`Second Button / Cancel`	Output	Fires when the second button is chosen or the dialog is canceled.

C++ Example

  #include "MessageBoxWindows.h"

  ECustomDialogResult Result = ECustomDialogResult::SecondButton;
  UNativeMessageBox::ShowMessageBox(
      TEXT("Install"),
      TEXT("Start installation now?"),
      EWNTMessageBoxIcon::Information,
      TEXT("Start"),
      TEXT("Later"),
      true,
      Result
  );

Show Regular Message Box Async

Shows the custom task dialog asynchronously.

Pin	Direction	Purpose
`WorldContextObject`	Input	Async action registration context.
`Title`	Input	Dialog window title.
`Message`	Input	Main message text.
`Icon`	Input	Optional native icon style.
`FirstButtonText`	Input	Text shown on the primary button.
`SecondButtonText`	Input	Text shown on the secondary button.
`bShowSecondButton`	Input	Controls whether the second button is shown.
`Then`	Output	Continues immediately after the async action is created.
`On First Button`	Output	Fires when the primary button is chosen.
`On Second Button`	Output	Fires when the secondary button is chosen or the dialog is canceled.

C++ Example

#include "MessageBoxWindows.h"

UFUNCTION()
void HandlePrimaryDialogButton();

UFUNCTION()
void HandleSecondaryDialogButton();

UAsyncRegularMessageBoxAction* Action =
    UAsyncRegularMessageBoxAction::ShowMessageBoxAsync(
        this,
        TEXT("Install"),
        TEXT("Start installation now?"),
        EWNTMessageBoxIcon::Information,
        TEXT("Start"),
        TEXT("Later"),
        true);

Action->OnFirstButton.AddDynamic(this, &UMyObject::HandlePrimaryDialogButton);
Action->OnSecondButton.AddDynamic(this, &UMyObject::HandleSecondaryDialogButton);

Message Box Library

Show Native Message Box

Show Native Message Box Async

Show Regular Message Box

Show Regular Message Box Async

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