-message = Message to show on the dialog.
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-caption = The dialog caption.
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-style = A dialog style (bitlist) containing flags chosen from the following:
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-wxOK Show an OK button.
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-wxCANCEL Show a Cancel button.
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-wxYES_NO Show Yes and No buttons.
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-wxCENTRE Centre the message. Not Windows.
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-wxICON_EXCLAMATION Shows an exclamation mark icon. Windows only.
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-wxICON_HAND Shows a hand icon. Windows only.
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-wxICON_QUESTION Shows a question mark icon. Windows only.