MessageBox函数，想必很多人都不会陌生！别看这个函数很简单，但是有一些功能，有人未必用过:P
请看下面的实例：
这个实例有什么特别的地方吗？自己编译运行一下就知道啦！
既然，提及到了这个函数，那就干脆写得完整一点吧！
1、MessageBox函数原型
它有4个参数，上面注释已经说明了各个参数的意义。下面，具体引述第4个参数的用法。
2、参数UINT uType
To indicate the buttons displayed in the message box, specify one of the following values.
|
Value |
Meaning |
|
MB_ABORTRETRYIGNORE |
The message box contains three push buttons: Abort, Retry, and Ignore. |
|
MB_CANCELTRYCONTINUE |
Windows 2000/XP: The message box contains three push buttons: Cancel, Try Again, Continue. Use this message box type instead of MB_ABORTRETRYIGNORE. |
|
MB_HELP |
Windows 95/98/Me, Windows NT 4.0 and later: Adds a Help button to the message box. When the user clicks the Help button or presses F1, the system sends a WM_HELP message to the owner. |
|
MB_OK |
The message box contains one push button: OK. This is the default. |
|
MB_OKCANCEL |
The message box contains two push buttons: OK and Cancel. |
|
MB_RETRYCANCEL |
The message box contains two push buttons: Retry and Cancel. |
|
MB_YESNO |
The message box contains two push buttons: Yes and No. |
|
MB_YESNOCANCEL |
The message box contains three push buttons: Yes, No, and Cancel. |
To display an icon in the message box, specify one of the following values.
|
Value |
Meaning |
|
MB_ICONEXCLAMATION, |
An exclamation-point icon appears in the message box. |
|
MB_ICONINFORMATION, MB_ICONASTERISK |
An icon consisting of a lowercase letter i in a circle appears in the message box. |
|
MB_ICONQUESTION |
A question-mark icon appears in the message box. |
|
MB_ICONSTOP, |
A stop-sign icon appears in the message box. |
To indicate the default button, specify one of the following values.
|
Value |
Meaning |
|
MB_DEFBUTTON1 |
The first button is the default button. MB_DEFBUTTON1 is the default unless MB_DEFBUTTON2, MB_DEFBUTTON3, or MB_DEFBUTTON4 is specified. |
|
MB_DEFBUTTON2 |
The second button is the default button. |
|
MB_DEFBUTTON3 |
The third button is the default button. |
|
MB_DEFBUTTON4 |
The fourth button is the default button. |
3、函数返回值
If the function succeeds, the return value is one of the following menu-item values.
|
Value |
Meaning |
|
IDABORT |
Abort button was selected. |
|
IDCANCEL |
Cancel button was selected. |
|
IDCONTINUE |
Continue button was selected. |
|
IDIGNORE |
Ignore button was selected. |
|
IDNO |
No button was selected. |
|
IDOK |
OK button was selected. |
|
IDRETRY |
Retry button was selected. |
|
IDTRYAGAIN |
Try Again button was selected. |
|
IDYES |
Yes button was selected. |
后记：一些常用的东西反而容易忘记！为了避免每次都得查MSDN，故整理如此，供日后参考。偷懒了，直接贴MSDN的资料上来:P