msgbox的用法(国外英文资料).doc

msgbox的用法(国外英文资料) Functions in VB can implement pop-up Windows. Action: displays the message in the dialog, waits for the user to click the button, and returns an Integer to tell the user which button to click. Grammar: MsgBox (prompt [, title] [, helpfile, context]) Parameters: The syntax for the MsgBox function has the following named parameters: Prompt -- necessary. The string expression, as a message in the dialog box. The maximum length of the prompt is approximately 1024 characters, determined by the width of the characters used. If prompt content is more than one line, can be in between each row with a carriage return (CRH) (13), a newline (CRH) (10) or a carriage return and the combination of a newline (CRH (13) and CRH (10)) will all separated. Buttons -- -optional. Numerical expression is the sum of value, specify the number of buttons and form, use the icon of style, what is the default button, and forced response message box, etc. If omitted, the default value of buttons is 0. Title -- - optional. The string expression shown in the title bar of the dialog box. If the title is omitted, the application name is placed in the title bar. Helpfile -- -optional. String expressions, which identify the help files used to provide contextual help to the dialog. If helpfile is provided, it must also provide context. Context -- -optional. Numeric expressions, by the author of the help file, specify the help context number for the appropriate help topic. If the context is provided, the help file must also be provided. A constant for the Button parameter in the MsgBox function Constant value specification VbOKOnly 0 only shows the confirm button VbOKCancel 1 shows the confirm and cancel button VbAbortRetryIgnore 2 shows the end, retry and ignore button VbYesNoCancel 3 shows yes, no and cancel buttons VbYesNo 4 shows yes and no buttons VbRetryCancel 5 shows the retry and cancel button VbCritical 16 shows the critical information icon VbQuestion 32 shows the warning quer