To generate an enhanced message box, an application calls WinMessageBox2. An enhanced message box has all the functionality of the standard message box, with the addition of the following:

• It can be modeless.
  
• Its buttons can be customized with text and icons.
  
• It can support customized icons in the window icon field.

In creating enhanced message boxes, the MB2INFO button information block structure is used to specify button style flags as shown in the following table:

┌────────────────────┬────────────────────────────────────────┐│Style Name          │Description                             │
├────────────────────┼────────────────────────────────────────┤
│MB_APPLMODAL        │Message box is application modal.  This │
│                    │is the default case.                    │
├────────────────────┼────────────────────────────────────────┤
│MB_CUSTOMICON       │A user-specified value.                 │
├────────────────────┼────────────────────────────────────────┤
│MB_ERROR            │Message box contains a small red circle │
│                    │with a red line across it.              │
├────────────────────┼────────────────────────────────────────┤
│MB_ICONASTERISK     │Message box contains an information (i) │
│                    │icon.                                   │
├────────────────────┼────────────────────────────────────────┤
│MB_ICONEXCLAMATION  │Message box contains an exclamation     │
│                    │point (!) icon.                         │
├────────────────────┼────────────────────────────────────────┤
│MB_ICONHAND         │Message box contains a small red circle │
│                    │with a red line across it.              │
├────────────────────┼────────────────────────────────────────┤
│MB_ICONQUESTION     │Message box contains a question mark (?)│
│                    │icon.                                   │
├────────────────────┼────────────────────────────────────────┤
│MB_INFORMATION      │Message box contains an information (i) │
│                    │icon.                                   │
├────────────────────┼────────────────────────────────────────┤
│MB_MOVEABLE         │Message box is moveable.  A title bar   │
│                    │and system menu with Move, Close and    │
│                    │Task Manager choices are displayed.     │
├────────────────────┼────────────────────────────────────────┤
│MB_NOICON           │Message box is not to contain an icon.  │
├────────────────────┼────────────────────────────────────────┤
│MB_NONMODAL         │Message box is modeless (the program    │
│                    │continues after displaying the message  │
│                    │box).                                   │
├────────────────────┼────────────────────────────────────────┤
│MB_QUERY            │Message box contains a question mark (?)│
│                    │icon.                                   │
├────────────────────┼────────────────────────────────────────┤
│MB_SYSTEMMODAL      │Message box is system modal.            │
├────────────────────┼────────────────────────────────────────┤
│MB_WARNING          │Message box contains an exclamation     │
│                    │point (!) icon.                         │
└────────────────────┴────────────────────────────────────────┘