本文目录
- delphi中messagebox函数的用法
- MessageBox参数的问题
- MessageBox函式的参数说明
- 在W32控制台应用程序中如何设置MessageBox的参数
- messagebox是c语言中的函数吗 如何用
- VC中MessageBox函数用参数详见《问题补充》，谢谢了！
- MessageBOX函数有几个参数，分别作用是什么
delphi中messagebox函数的用法
在delphi中经常要用到一个提示对话框，根据用户选择执行不同的命令，MessageBox就是常用的对话框，它不仅能够定义显示的信息内容、信息提示图标，而且可以定义按钮组合及对话框的标题，是一个功能齐全的信息对话框信息提示图标，而且可以定义按钮组合及对话框的标题，是一个功能齐全的信息对框。
1、函数原型及参数
function MessageBox(hWnd: HWND; Text, Caption: PChar; Type: Word): Integer;
hWnd：对话框父窗口句柄，对话框显示在Delphi窗体内，可使用窗体的Handle属性，否则可用0，使其直接作为桌面窗口的子窗口。
Text：欲显示的信息字符串。
Caption：对话框标题字符串。
Type：对话框类型常量。
该函数的返回值为整数，用于对话框按钮的识别。
2、类型常量
对话框的类型常量可由按钮组合、缺省按钮、显示图标、运行模式四种常量组合而成。
(1)按钮组合常量
MB_OK = $00000000 //一个确定按钮 默认
MB_OKCANCEL = $00000001 //一个确定按钮，一个取消按钮
MB_ABORTRETRYIGNORE = $00000002; //一个异常终止按钮，一个重试按钮，一个忽略按钮
MB_YESNOCANCEL = $00000003; //一个是按钮，一个否按钮，一个取消按钮
MB_YESNO = $00000004; //一个是按钮，一个否按钮
MB_RETRYCANCEL = $00000005; //一个重试按钮，一个取消按钮
(2)缺省按钮常量
MB_DEFBUTTON1 = $00000000; //第一个按钮为缺省按钮
MB_DEFBUTTON2 = $00000100; //第二个按钮为缺省按钮
MB_DEFBUTTON3 = $00000200; //第三个按钮为缺省按钮
MB_DEFBUTTON4 = $00000300; //第四个按钮为缺省按钮
(3)图标常量
MB_ICONHAND = $00000010; //“×”号图标
MB_ICONQUESTION = $00000020; //“？”号图标
MB_ICONEXCLAMATION = $00000030; //“！”号图标
MB_ICONASTERISK = $00000040; //“i”图标
MB_USERICON = $00000080; //用户图标
MB_ICONWARNING = MB_ICONEXCLAMATION; //“！”号图标
MB_ICONERROR = MB_ICONHAND; //“×”号图标
MB_ICONINFORMATION = MB_ICONASTERISK; //“i”图标
MB_ICONSTOP = MB_ICONHAND; //“×”号图标
(4)运行模式常量
MB_APPLMODAL = $00000000; //应用程序模式，在未结束对话框前也能切换到另一应用程序
MB_SYSTEMMODAL = $00001000; //系统模式，必须结束对话框后，才能做其他操作
MB_TASKMODAL = $00002000; //任务模式，在未结束对话框前也能切换到另一应用程序
MB_HELP = $00004000; //Help Button
3、函数返回值
0 //对话框建立失败
IdOk = 1 //按确定按钮
IDCancel = 2 //按取消按钮
IDAbout = 3 //按异常终止按钮
IDRetry = 4 //按重试按钮
IDIgnore = 5 //按忽略按钮
IDYes = 6 //按是按钮
IDNo = 7 //按否按钮
应用实例：
Application.MessageBox(’你确定此操作吗？’,’询问’,MB_OK);//只有一个确定按钮
MessageBox(0,’你确定此操作吗？’,’询问’,MB_OK); //只有一个确定按钮
MessageBox(0,’你确定此操作吗？’,’询问’,1); //确定取消(如果不带图标，也可以用数字)
MessageBox(0,’你确定此操作吗？’,’询问’,MB_OKCANCEL);//确定取消二个按钮
MessageBox(0,’你确定此操作吗？’,’询问’,MB_OKCANCEL+MB_ICONQUESTION);//确定取消，带？号图标
MessageBox(0,’你确定此操作吗？’,’询问’,MB_OKCANCEL+MB_ICONQUESTION+MB_DEFBUTTON2);//确定取消，带？号图标，并把第二个按钮“取消”设为默认按钮！
如果想判断用户选择了那个按钮可以这样
var
x:integer;
begin
x:=MessageBox(0,’你确定此操作吗？’,’询问’,MB_OKCANCEL);
end;
判断时可以是if x=1 then ..或if x=idok then...
给你举个例子：
if messagebox(0,’您确定要导入数据吗？ ’,’系统询问?’,MB_YESNO+MB_ICONQUESTION)《》6 then
begin
Screen.Cursor:= crDefault; //恢复系统光标
exit;
end;
MessageBox参数的问题
哈哈，同学，MessageBox有两种，一种是API函数，另一种是MFC的CWnd类里对MessageBox API进行封装后的函数，名字也叫MessageBox。
你的前一种情况是引用了windows API的头文件，只能使用API的那个，是四个参数。
后一种情况是MFC框架，你的CMy1Dlg继承CWnd类，那么你的MessageBox用的就是CWnd里的那个，是三个参数。想用API，这样写::MessageBox(NULL,“示例用法“, “demo“, MB_OK); 加两个冒号
MessageBox函式的参数说明
hWnd：
指定该对话框的所有者窗口。如果该参数为空(0)，则该对话框不属于任何窗口（？）。
lpText:
显示在对话框中的消息。
lpCaption：
在对话框标题栏中显示的字符串表达式。如果该参数为空（vbNullString），则使用默认的“错误”作为对话框的标题。
wType：
指定显示按钮的数目及形式，使用的图标样式，缺省按钮是什么以及消息框的强制回应等。可以为下列常数之一或某几个数值相加的和。
指定按钮样式：
MB_ABORTRETRYIGNORE
显示 Abort、Retry 及 Ignore 按钮。
MB_OK
只显示 OK 按钮。（默认）
MB_OKCANCEL
显示 OK 及 Cancel 按钮。
MB_RETRYCANCEL
显示 Retry 及 Cancel 按钮。
MB_YESNO
显示 Yes 及 No 按钮。
MB_YESNOCANCEL
显示 Yes、No 及 Cancel 按钮。
指定图标样式：
MB_ICONEXCLAMATION, MB_ICONWARNING
显示 Warning Message 图标。
MB_ICONINFORMATION, MB_ICONASTERISK
显示 Information Message 图标。
MB_ICONQUESTION
显示 Warning Query 图标。
MB_ICONSTOP, MB_ICONERROR, MB_ICONHAND
显示 Critical Message 图标。
指定默认按钮：
MB_DEFBUTTON1
第一个按钮是缺省值。（默认）
MB_DEFBUTTON2
第二个按钮是缺省值。
MB_DEFBUTTON3
第三个按钮是缺省值。
MB_DEFBUTTON4
第四个按钮是缺省值。
指定对话框模式等：
MB_APPLMODAL
应用程序强制返回；应用程序一直被挂起，直到用户对消息框作出响应才继续工作。
MB_SYSTEMMODAL
系统强制返回；全部应用程序都被挂起，直到用户对消息框作出响应才继续工作。
MB_TASKMODAL
MB_DEFAULT_DESKTOP_ONLY
MB_HELP
将Help按钮添加到消息框。
MB_RIGHT
文本为右对齐。
MB_RTLREADING
指定文本应为在希伯来和阿拉伯语系统中的从右到左显示。
MB_SETFOREGROUND
指定消息框窗口作为前景窗口。
MB_TOPMOST
MB_SERVICE_NOTIFICATION
MB_SERVICE_NOTIFICATION_NT3X
MB_SERVICE_NOTIFICATION
返回值：
如果没有足够内存创建消息对话框，则返回0。
如果函数成功运行，则返回下列数值之一：
IDABORT
用户点击了 Abort 按钮。
IDCANCEL
用户点击了 Cancel 按钮。
IDIGNORE
用户点击了 Ignore 按钮。
IDNO
用户点击了 No 按钮。
IDOK
用户点击了 OK 按钮。
IDRETRY
用户点击了 Retry 按钮。
IDYES
用户点击了 Yes 按钮。
如果对话框显示 Cancel 按钮，则按下 ESC 键与单击 Cancel 按钮的效果相同。
原文：
The MessageBox function creates, displays, and operates a message box. The message box contains an application-defined message and title, plus any combination of predefined icons and push buttons.
Declaration:
Declare Function MessageBox Lib user32 Alias MessageBoxA (ByVal hwnd As Long, ByVal lpText As String, ByVal lpCaption As String, ByVal wType As Long) As Long
Parameters:
?hWnd
Identifies the owner window of the message box to be created. If this parameter is NULL, the message box has no owner window.
?lpText
Points to a null-terminated string containing the message to be displayed.
?lpCaption
Points to a null-terminated string used for the dialog box title. If this parameter is NULL, the default title Error is used.
?uType
Specifies a set of bit flags that determine the contents and behavior of the dialog box. This parameter can be a combination of flags from the following groups of flags.
Specify one of the following flags to indicate the buttons contained in the message box:
MB_ABORTRETRYIGNORE
The message box contains three push buttons: Abort, Retry, and Ignore.
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.
Specify one of the following flags to display an icon in the message box:
MB_ICONEXCLAMATION,
MB_ICONWARNING
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,
MB_ICONERROR,
MB_ICONHAND
A stop-sign icon appears in the message box.
Specify one of the following flags to indicate the default button:
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.
Specify one of the following flags to indicate the modality of the dialog box:
MB_APPLMODAL
The user must respond to the message box before continuing work in the window identified by the hWnd parameter. However, the user can move to the windows of other applications and work in those windows.
Depending on the hierarchy of windows in the application, the user may be able to move to other windows within the application. All child windows of the parent of the message box are automatically disabled, but popup windows are not.
MB_APPLMODAL is the default if neither MB_SYSTEMMODAL nor MB_TASKMODAL is specified.
MB_SYSTEMMODAL
Same as MB_APPLMODAL except that the message box has the WS_EX_TOPMOST style. Use system-modal message boxes to notify the user of serious, potentially damaging errors that require immediate attention (for example, running out of memory). This flag has no effect on the user’s ability to interact with windows other than those associated with hWnd.
MB_TASKMODAL
Same as MB_APPLMODAL except that all the top-level windows belonging to the current task are disabled if the hWnd parameter is NULL. Use this flag when the calling application or library does not have a window handle available but still needs to prevent input to other windows in the current application without suspending other applications.
In addition, you can specify the following flags:
MB_DEFAULT_DESKTOP_ONLY
The desktop currently receiving input must be a default desktop; otherwise, the function fails. A default desktop is one an application runs on after the user has logged on.
MB_HELP
Adds a Help button to the message box. Choosing the Help button or pressing F1 generates a Help event.
MB_RIGHT
The text is right-justified.
MB_RTLREADING
Displays message and caption text using right-to-left reading order on Hebrew and Arabic systems.
MB_SETFOREGROUND
The message box becomes the foreground window. Internally, Windows calls the SetForegroundWindow function for the message box.
MB_TOPMOST
The message box is created with the WS_EX_TOPMOST window style.
MB_SERVICE_NOTIFICATION
Windows NT only: The caller is a service notifying the user of an event. The function displays a message box on the current active desktop, even if there is no user logged on to the computer.
If this flag is set, the hWnd parameter must be NULL. This is so the message box can appear on a desktop other than the desktop corresponding to the hWnd.
For Windows NT version 4.0, the value of MB_SERVICE_NOTIFICATION has changed. See WINUSER.H for the old and new values. Windows NT 4.0 provides backward compatibility for pre-existing services by mapping the old value to the new value in the implementation of MessageBox and MessageBoxEx. This mapping is only done for executables that have a version number, as set by the linker, less than 4.0.
To build a service that uses MB_SERVICE_NOTIFICATION, and can run on both Windows NT 3.x and Windows NT 4.0, you have two choices. 1. At link-time, specify a version number less than 4.0; or
2. At link-time, specify version 4.0. At run-time, use the GetVersionEx function to check the system version. Then when running on Windows NT 3.x, use MB_SERVICE_NOTIFICATION_NT3X; and on Windows NT 4.0, use MB_SERVICE_NOTIFICATION.
MB_SERVICE_NOTIFICATION_NT3X
Windows NT only: This value corresponds to the value defined for MB_SERVICE_NOTIFICATION for Windows NT version 3.51.
Return values:
The return value is zero if there is not enough memory to create the message box.
If the function succeeds, the return value is one of the following menu-item values returned by the dialog box:
IDABORT
Abort button was selected.
IDCANCEL
Cancel button was selected.
IDIGNORE
Ignore button was selected.
IDNO
No button was selected.
IDOK
OK button was selected.
IDRETRY
Retry button was selected.
IDYES
Yes button was selected.
If a message box has a Cancel button, the function returns the IDCANCEL value if either the ESC key is pressed or the Cancel button is selected. If the message box has no Cancel button, pressing ESC has no effect.
在W32控制台应用程序中如何设置MessageBox的参数
messagebox有两种，一种是api函数，另一种是mfc的cwnd类里对messagebox
api进行封装后的函数，名字也叫messagebox。
一种情况是引用了windows
api的头文件，只能使用api的那个，是四个参数。
一种情况是mfc框架，你的cmy1dlg继承cwnd类，那么你的messagebox用的就是cwnd里的那个，是三个参数。想用api，这样写::messagebox(null,“示例用法“,
“demo“,
mb_ok);
加两个冒号
messagebox是c语言中的函数吗 如何用
准确来说是系统API函数原型是int MessageBox(HWND hWnd,LPCTSTR lpText,LPCTSTR lpCaption,UINT UType);比如写成#include 《Windows.h》int main(){
MessageBox(0, “我是内容“, “我是标题“, MB_OK);
return 0;
}
运行截图就是
VC中MessageBox函数用参数详见《问题补充》，谢谢了！
char a;
scanf(“%s“,a);
MessageBox(NULL,a,“标题“,1);
MessageBox()有四个参数，第一个窗口句柄为NULL，第二个为字符串型显示内容，第三个为字符串型标题，第四个是信息窗口中按键数目，一般3以内数字，可以写成MB_YESNO就是 “是，否“，两个键
MessageBOX函数有几个参数，分别作用是什么
MFC的MessageBox封装在CWnd类中，原型
int CWnd::MessageBox( LPCTSTR lpszText, LPCTSTR lpszCaption = NULL, UINT nType = MB_OK );
只有一个必须的参数lpszText。
你自己写的MessageBox默认调用Win32 API，原型
int MessageBox(
HWND hWnd, // handle to owner window
LPCTSTR lpText, // text in message box
LPCTSTR lpCaption, // message box title
UINT uType // message box style
);
需要四个参数。
