typedef struct tagMSGBOXPARAMSA
{
    UINT        cbSize;
    HWND        hwndOwner;
    HINSTANCE   hInstance;
    LPCSTR      lpszText;
    LPCSTR      lpszCaption;
    DWORD       dwStyle;
    LPCSTR      lpszIcon;
    DWORD_PTR   dwContextHelpId;
    MSGBOXCALLBACK      lpfnMsgBoxCallback;
    DWORD       dwLanguageId;
} MSGBOXPARAMSA, *PMSGBOXPARAMSA, *LPMSGBOXPARAMSA;

typedef PMSGBOXPARAMSA PMSGBOXPARAMS;