C++ MessageBox MessageBoxA MessageBoxW AfxMessageBox

 轉自：http://blog.sina.com.cn/s/blog_5059be880100whu3.html

C語言的MessageBox
MessageBoxA(
    HWND hWnd ,
    LPCSTR lpText,
    LPCSTR lpCaption,
    UINT uType);

MessageBoxW(
    HWND hWnd ,
    LPCWSTR lpText,
    LPCWSTR lpCaption,
    UINT uType);

#ifdef UNICODE
#define MessageBox  MessageBoxW
#else
#define MessageBox  MessageBoxA
#endif

例：MessageBox(NULL,TEXT("世界你好！"),TEXT("問好"),MB_YESNO|MB_ICONEXCLAMATION);

其中按鈕宏有：
#define MB_OK                       0x00000000L
#define MB_OKCANCEL                 0x00000001L
#define MB_ABORTRETRYIGNORE         0x00000002L
#define MB_YESNOCANCEL              0x00000003L
#define MB_YESNO                    0x00000004L
#define MB_RETRYCANCEL              0x00000005L

表徵圖宏有：
#define MB_ICONHAND                 0x00000010L
#define MB_ICONQUESTION             0x00000020L
#define MB_ICONEXCLAMATION          0x00000030L
#define MB_ICONASTERISK             0x00000040L

MessageBox的傳回值宏有：
#define IDOK                1
#define IDCANCEL            2
#define IDABORT             3
#define IDRETRY             4
#define IDIGNORE            5
#define IDYES               6
#define IDNO