-wxFileDialog()
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-wxFileDialog(wxWindow* parent, const wxString& message = "Choose a file", const wxString& defaultDir = ""
-, const wxString& defaultFile = "", const wxString& wildcard = "*.*", long style = 0, const wxPoint& pos = wxDefaultPosition)
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-Constructor. Use wxFileDialog::ShowModal to show the dialog.
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-Parameters
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-parent = Parent window.
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-message = Message to show on the dialog.
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-defaultDir = The default directory, or the empty string.
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-defaultFile = The default filename, or the empty string.
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-wildcard = A wildcard, such as "*.*".
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-style = A dialog style. A bitlist of:
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-wxOPEN This is an open dialog (Windows only).
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-wxSAVE This is a save dialog (Windows only).
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-wxHIDE_READONLY Hide read-only files (Windows only).
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-wxOVERWRITE_PROMPT Prompt for a conformation if a file will be overridden (Windows only).
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-pos = Dialog position.